My computer has regressed over time in performance. Maybe it's because I have installed a lot of programs I'm not sure but the os is slow to shut down. I get message Waiting for background programs to close and it was explorer.exe. As matter fact explorer.exe is really causing issues in os. Crashing frequently, hogging resources, its frustrating! What is wrong with the os? I know Windows 7 is not perfect os but is this normal?