WinUtilities Free Edition
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Full user review
"Ignores my setup selections. Disrupts Internet search."
It found 1400 errors which it claims to have fixed. Eliminated the original problem of 100% CPU usage for one week, then problem resumed. Malware?
Ignored my selections NOT to run automatically. My Internet searches were locking up because Registry Mechanic was running in background. Stop that in Task Mgr, and Internet runs fine. I've had to delete it.
Use it once, then delete it.