Blue Desktop no Icons No start Button No Task Bar

Last night my father ran a Deep scan with his BitDefender Program, this morning he went in to computer and has a solid blue screen, no Icons at all, No start Button and no task bars. The My Documents auto opens is all, Everything is in the computer still, all looks well just no shortcuts, nor am I capable of creating and dragging new to the desktop, any suggestions would be awesome Thank you in advance, Dawn
PS he is running windows xp

 

Yes, I am able to open Task manager, as well as another account, I don't know how to boot into safe mode I found the option once and i showed 3 different modes of safe to boot in I didnt know which to chose.

 

ok will do, no the other account isnt set as an admin, I have full use of the computer still, nothing seems to be missing, just all short cuts are invalid and nothing at all on desktop but I can navigate to anything through the my documents page that seems to have replaced the desktop.

 

ok i have admin set and in safe mode now and do have icons on desktop in safemode however I dont know if this is anything upon login I did get this ... acoeo9reo.exe has encountered a prob and needs to close, but Im still up and running.

 

ok now Im thrown off I rebooted cause my keyboard was not typing and now all my icons are back on my computer in regular mode.????

 

thank you hun Will do, cause apparently something did still happen and there was a trojan nabbed by bitdefender at the time I lost the desktop. IM ON WAY TO WORK SO i WILL GET THE LOS TO YOU THIS EVENING. Ooops, thank you sooo much. Dawn