My Opinions:
Get avast Antivirus from www.avast.com
Get home edition and register to get keys.
Install it and start it. Enter reg code and cancel memory scanning at startup.

After it has started, Right click and click on boot schedule scan. Accept restart now then let it do the job. Just move any infection at prompt. After system is cleaned up, Run check disk by right click properties for disk integrity check, also defragmentation

hen Go to www.wise.com and get free version of their registry and disck cleaners; install them and fix your problems. Google for Revo Uninstaller and download it. Install it and use it to completely remove programs that seems to be sturbborn. Be careful not to remove device drivers or your own programs!

Don't forget to feedback on issue
Hope it will help you
Steve