|Windows OS has had the same issue since Windows 1.1. They locked stuff to a thing called registry. That and some other issues tend to slow your OS down over time. While it could be malware or spyware and tends to be so if you are not running a full security suite. The solution I use is to reload the entire OS from OEM media. Apply a security suite and apply updates. |
If that should fail for some reason then you may need to look to memory bad or not reporting or in some cases hard drive failing or even some bios setting.
Text, talk, drive...CRASH.
Hang up and drive @#$%^^