System Restore is a real aid when it comes to rolling back bad Windows patches and driver updates, but by its very nature, it is said to impact performance because it’s always creating restore points, thus robbing you of a little power.
The truth: System Restore lurks idle most of the time and rarely does anything at all, creating checkpoints only during app installs plus once every 24 hours by default. Even then it spends only a few seconds doing so and only during idle time.
It’s virtually unthinkable that you’d try to run a program at the exact same time that System Restore began creating a restore point, and even if you did, you probably wouldn’t notice.
The proof is in the benchmarks: We got nearly identical results on PCMark whether System Restore was on or off.
(Note, however, that System Restore can consume a fair amount of disk space—this is configurable—so if gigabytes are precious to you, consider throttling it back.)
From: 25 Most Popular Windows Tips: The Best Explained and Worst Debunked
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