Welcome to Press F1, Misery 05
I sympathise with you. So will many others.
But being realistic, unless you give more details than that, you're unlikely to get any help.
You say you've checked for bad stuff - like what did you check with.? (There are lots of options,. Which ones did you try?)
What's your operating system.?
How long have you had the problem?
What - if anything - had you just changed before it happened?
Those will do for starters...
With more info, someone here may be able to help..