This free PC optimizer suspends unnecessary system processes, clears out memory and defrags your system to get the very best game performance possible. If your system struggles when you're trying to get your game on, Razer Cortex could well be the answer. The only negative is that the free version allows you to run the software, but not any of the repair tools. This should be quite self-explanatory, but Restoro’s full money-back guarantee basically means that you can request a full refund if you’re not happy with the program’s performance. These are designed to help you keep tabs on your computer, identifying potentially dangerous apps or security breaches before any damage is caused. If you have one of the two unlimited use plans, you will benefit from the power of Restoro’s excellent real-time monitoring tools. Any suspicious files will be immediately identified, and you can decide whether or not they need to be removed. Numerous problems are scanned for, listed if found, and repaired with the powerful system repair tool. All Restoro scans include built-in malware (opens in new tab) detection. Restoro doesn’t boast the biggest feature list we’ve seen, but it does a great job of providing the essentials and managing those well without adding too many unnecessary extras. Read our full Iolo System Mechanic review. Read on for four more of the best apps around for speeding up your Windows PC. The genuine performance boost we saw after running System Mechanic made it our favorite PC optimizer. The free edition is excellent, but the two premium versions – System Mechanic and System Mechanic Pro – are well worth considering if you find yourself using it regularly – and Iolo is offering a 70% discount (opens in new tab) with the voucher code TECHRADAR. Its PC optimization toolkit really does make a difference whenever we've tested System Mechanic we've found a significant speed improvement, especially at startup. Not only does this free up key system resources, it also eliminates traces of your browsing activity to protect your privacy. Iolo System Mechanic removes junk files and unwanted apps, blocks bloatware and unwanted auto-run settings, clears out RAM and wipes various logs, browser histories and caches. This is a very large extra charge, so make sure to double-check before entering your payment details.

Update: A recent change to Iolo's checkout process means you will be automatically subscribed to a $19.99 (about £15 / AU$25) per month support package when you purchase a product.

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