But it is the truth. If you look at the OP post history regarding techie questions I do think that is the smartest things to do.
Just take it in to a respectable shop (JIB has always been good to me) and if you tell them the symptoms they will deal with it (and someone said, if you have sensitive stuff on there, just watch what they are doing)
There are programs to deal with cleaning stuff of your HDD's (CCleaner I personally like but it also has its issues (being hacked is one for example) but you have to know what you are doing before deleting stuff before you get the
"Help, I usually dont have to login to <insert site> and NOW I must" question