winlogon.exe

My daughter's computer had some viruses/trojans, i did a complete scan with norton security 2010 and found 9.  When it was done the scan it said "winlogon.exe was found and deleted, please restart your computer"  So I did, and now cannot logon to the computer.  Will logon then logoff.  Anything I can do?  Safe mode?  I don't want her to use our laptop because she seems to pick up viruses from somewhere.