Weird Virus

I'm not a techie, so bear with me. Over the past month or so, I've had a strange thing happen to my computer. I'm not sure if it's an XP issue or what. Every so often, out of nowhere, a repeating dash enters into a field and continues to print itself .. line after line .. like this:

------------------------------------------------------------------------------------------------------------------------------ etc.

Does anyone know what causes this? And, if so, how to I rid it from my computer? Thank you for your help

Have you tried cleaning your keyboard with canned air?


Also:


Try a System Restore to a point prior to the problem:

start > All Programs > Accessories > System Tools > System Restore






If that doesn't help follow the instructions in this link:

http://www.techhelpforum.com/showthread.php?t=3702