Ugh, bad day in computer land at my house.

FF crashed on FB again this AM so I switched to Opera as sometimes it seems a little better when it isn't running right. I was off FB and it froze up when I looked at a page of images and would not unfreeze. I tried Task Manager several times to no avail and finally tried to turn it off. It seemed like it only turned part way off or something, I had a black screen and nothing would happen if I tried to turn it off again or bring it back up. I let it set awhile and it finally came back on but loaded slooooowly and gimpy. Now it seems ok.

My question is I was going to get some of the stuff Jo recommended, Housecall, etc and then get Glary but I am kind of afraid to download something and over tax it? Can you have a virus or malware that is only active part of the time?

thanks,
judi