Recently I had a tech install a new hard drive. Since then, at times my PC runs V E R Y S L O W L Y...other times it is just fine.
I think it is either my hard drive, or perhaps the Bitdefender security suite he installed.
He left me hanging and won't even answer my calls.
How can I find out for sure what the problem is?
I have a Dell Inspirion 530, about 5 years old. It's a great machine...