Window scrolls continuously

I open illustrator create a file and when I try to use the scroll bars the sofware goes crazy  and the window scrolls crazilly both horizontal and vertical.  The only way I can get it to shutdown is to close it from the taskbar.  I am not software literate but I have been using adobe products for year without major issues until this occurencel.  I get no error message just all the controls are frozen.  I use illustrator a lot especially when I'm trying to manipulate text so it is important to me.  Please give advice to try any fix-up you can suggest.  I've read some posts that said there is a problem with the graphics pen but I use my tablet with all my software with no issue.  Your advice would be greatly appreciated.  Thanks.

Manny