Desktop is hiding from Admin. othre users are ok

My Hp Pavilion has been a clean machine (due to your expert advise in the past),
until my adult son brought his comp to my business and logged onto the internet via my connection. Not sure where his comp. has been.



Now I have no Desktop. I cannot access any thing to try and see what has happened. I have blue fractal screen. Cannot access internet except thru. hp button on keyboard or thru another user acct.

I know you guys have the answer, and it's probably very simple.

I would like to send a HiJack This Log for you, but under circumstances not sure how.

My business (florist) is sorta shut down till I get this fixed.

Thanks a bunch!! Wow has this forum changed in just a few years!

NewGirl (but now not so new)