Important: Your current Windows version is outdated and no longer supported.
For your security, we recommend switching to Windows 10 or Windows 11 before downloading Avira software. Update your Windows version here.
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Speed up and optimize all your devices

Download free apps for enhanced performance

  • Get extra speed & faster starts
  • Free up storage space & memory
  • Clean your system & browsers
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"One of the best tune-up tools on the market”
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Enhance the performance of all your devices

Optimize your Mac

Avira Optimizer for macOS helps you free up space on your Mac by removing unwanted files, browser caches, and more.

  • Junk cleaner finds and removes unncessary files and browser junk.
  • Duplicate finder helps you get rid of duplicate files and increase storage space.

Speed up your Windows PC

Avira System Speedup includes free PC cleaner and optimization tools that help you enhance your system's performance.

  • Startup optimizer helps you speed up your computer's boot time.
  • Power cleaner helps you free up space and tune up your disk.

Optimize your mobile devices

Avira Antivirus for Android and Avira Mobile Security for iOS include performance optimization tools, plus essential security and privacy features. Enhance your mobile device's performance with:

  • Duplicate file finder
  • Memory booster

8 reasons to optimize your devices

Faster starts

More space

Better gaming

More battery

Save money

More privacy

More stability

Maintenance

Laptop, smartphone, or tablet?

Enhance the performance of all your devices

Looking for premium optimization tools?

Discover System Speedup ProFor Windows

Faster starts and quicker processing

Avira streamlines the way programs and apps open and run on your device, so you enjoy faster startups and smoother surfing. 

  • Blocks apps that hog your resources
  • Frees up memory
  • Reduces freezing and crashes

 

Free up storage space

No need to keep buying new hard drives or SD cards. Over time, your storage fills up with junk, temporary, and cached files. Use Avira to take control and clear them out!

Stay mobile for longer

Keep working and enjoying life wherever you are. Squeeze every drop of juice from your battery with a range of smart, energy efficient features. Laptops, tablets, and mobiles – Avira improves battery performance for them all.

Private by design: We don't sell your data.

Unlike most security vendors, Avira doesn't sell your data and never will. Nor do we share your data with 3rd parties such as government, Big Tech or advertising networks.

Avira has more than 35 years of online security experience

 

Trustpilot

From our best comments

Learn more about the following

What exactly does a RAM Cleaner do other than clean RAM?

It can speed you up, that’s what! More RAM means that processes run faster. Don’t buy more—clear out what you have…

Find out how our RAM Cleaner speeds up your device

Need to drive performance with our Speed Booster?

PC crawling like a snail? Devices are like car engines. Give them the cleanup and tune-up they need…

Find out how your PC can run like new with our Speed Booster

Want to last longer with our Battery Saver?

Battery icon flashing again? Find out what’s draining it and extend the performance of your mobile devices…

See how to optimize battery life with our Battery Saver

Is it time to clear out the clutter with our Junk Cleaner?

Screen frozen? For more speed, disk space, and performance, take out the trash (like junk files, temp files…)

Free up space and speed up your device now with our Junk Cleaner

An optimizer like Avira System Speedup for Windows helps you clean your device’s hard drive, browser, and registry in just a few clicks. This means you can speed up your device and free up storage space you didn’t know you had. Thanks to this optimizer from Avira, you can track down and delete duplicate, temporary, and cache files, the leftovers of uninstalled apps, and invalid registry entries. Avira System Speedup Pro also includes many other tools to manage your device’s power consumption, create backups, defragment your hard drive, encrypt confidential files, restore deleted data, and a whole bunch more.

You can make your computer faster by decluttering the system and removing apps and files you no longer need or moving them to the cloud or an external storage device. Once you’ve done that, it’s a good idea to use a free optimizer like Avira System Speedup for Windows to find and delete hidden junk files as well as make your device start faster. Our premium Avira System Speedup Pro edition comes with many additional tuning tools, plus you can have it regularly clean up and speed up your device automatically.

Optimize all your devices for free

Download for free Download for free Download for free Download for free

Renewal prices for certain annual plans will increase effective July 17, 2024. Review the new pricing here: loading... for Avira Prime - 5 devices, loading... for Avira Prime - 25 devices, loading... for Avira Antivirus Pro, loading... for Avira System Speedup, loading... for Avira Optimization Suite, loading... for Avira Internet Security.

*Important Subscription, Pricing and Offer Details
 

  • Contract Type: contract for a monthly or annual subscription, starting when the transaction is complete. Click here for our Terms of Sale. 
  • Set-up: to get the protection/service started, you must download and install on each device and/or complete set-up.  
  • Free Trial: payment method required if signing up for a free trial (credit/debit card or PayPal only). When the trial ends, the paid subscription starts and the first term is charged, unless cancelled before. Special offer(s) may expire.  
  • Renewal Cycle: automatically renews each month or each year after the initial term, unless the subscription renewal is cancelled before the day you are due to be charged in your account or by contacting us. Click here to learn how.  
  • Renewal Prices: may be higher than the price for the initial term and are subject to change. They are charged up to 35 days before the annual subscription is due to renew, and we send you a notification email with the renewal price before. They are charged up to 5 days before the monthly subscription is due to renew.  
  • Cancellation & Refund: you can cancel your contract and request a full refund within 60 days of purchase for annual subscriptions and within 14 days of purchase for monthly subscriptions. For each annual renewal or free trial with paid annual subscription, you can request a full refund within 60 days of being charged, and after the 60 days, a pro-rated refund of the days left in your renewed subscription term, beginning the month after you request the refund. For free trial with paid monthly subscription, you can request a full refund within 14 days of being charged. For details, visit our Cancellation & Refund Policy. To cancel your contract or request a refund, click hereclick here. 
  • Updates: your subscription may include product, service and/or protection updates, and features that may be added, modified, or removed, subject to the acceptance of the License & Services Agreement. 
  • Usage: for non-commercial household use only. If you have issues adding a device, please contact us.
Automatically renews, unless the renewal is cancelled. Price subject to change.
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Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
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Special offer for the first #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
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Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
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Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
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Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the first 2 year price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
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Special offer until #cma_promo_end_date#: #cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
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Offer details below.*
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Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
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Offer details below.*
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Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# (#cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#), and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
Offer details below.*
Payment method required. Special offer for the 1st #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
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Offer details below.*
Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# (#cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#), and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
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Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period# (#cma_promo_saved_price# off the first 2 year price of #cma_promo_standard_price#), and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Price subject to change.
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Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to the renewal price. Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to 2 x annual renewal price of #cma_promo_renewal_price# / year. Subscription details below.*
Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to the renewal price. Subscription details below.*
Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
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Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Savings compared to the renewal price. Subscription details below.*
Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
Special offer for the first #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
Special offer for the 1st #cma_period# until #cma_promo_end_date#. Automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Subscription details below.*
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Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer for the 1st #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer for the first #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period# and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer for the 1st #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.*
Payment method required. When trial ends: paid subscription starts and automatically renews, unless the renewal is cancelled. Price subject to change.
Offer details below.*
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The remaining value left on your current subscription is converted into additional days in your new subscription.
Big savings. Strong online security: 45% off Avira Prime >
Riesen Rabatt. Starke Online-Sicherheit: 45% auf Avira Prime >