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What do you use to keep your computer running smoothly?
What do you use to keep your computer secure and running smoothly?
What do you use to keep your computer secure and running smoothly?
Opinions vary. You can find/read plenty of threads about which combinations of antivirus and malware scanners people use - so there is no need to start yet another series of posts about that.
As far as performance: I use nothing. I let Windows do what it was written to do.
I might run CCleaner from time to time (not the registry cleaning part) but that does not improve performance or stability by any amount that I can see or even measure with benchmarking software.
Most important is to get and keep a perfect install, using the steps collected from helping with tens of thousands of installs here in Clean Reinstall - Factory OEM Windows 7 which are the same for retail.
As long as you stick with the tools and methods in the the tutorial, you'll maintain a perfect install for as long as you do.