Maybe you could run "
Task Manager" (split screen) and a program that has the problems (e.g. Winamp).
Have "
Task Manager" set to the "
Processes" tab and check to see if any processes are suddenly using up all of your CPU.
You'll have to click on the link to see the picture.
Attachment 194911
Is your AV program working properly?
Have you tried using a registry cleaner (e.g. CCleaner, Glary Utilities, etc.) to clean up your "
Registry" and junk files (remember backup the Registry when it asks you)?
This is a controversial option (I've never had any problems with registry cleaners, but other members have).
Can you restore your PC to a date before the problem started using a "
System Restore" point?
Do you remember if you installed any new software or updates, just before the problem started ("
Programs and Features" should show you the install dates)?
If so, try uninstalling and reinstalling.
Do you have any HDD images that you can use to reimage your HDD?
You may have to reinstall Windows.