I do not know if it's a virus for certain. It may be something that just happens because the computer is old and doing funny things.
There is a sort of virus or random acting condition where sometimes when I am on the internet and typing, all of the sudden the page starts turning black and the screen gets smaller for like 10 seconds. Why the heck is this happening.
By the way, I love this forum and it's advice. It's given on buying the right hardware and software. I can't wait to share my opinions here.