There’s a feature in Windows 7 called System Protection that saves older versions of files and folders, and lets you restore to them easily in case of a problem.
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General
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Keep your computer without upgrading
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For beginning computer users
Optimizations
Make your computer work with fewer errors
PC Bottlenecks
Computer elements that slow it down
Registry Insights
How the Windows Registry works
Windows 10
Are you using Windows 10? View tips and tricks specifically for you.