hi ive been noticing my computer is running slow, i also get a message saying windows explorer has encountered a problem and needs to close, and some times the font has changed to large on the internet. I run ccleaner, spybot, spyware doctor, spyware doctor, a registry mechanic and i use pc guard from blueyonder which is anti virus,firewall,spyware,id theft protection, and pop up blocker i run all these once a week at least if i have a problem i think ill give up computing cuz i dont know wot else to do . please help!! :(