I would still do a system restore
Go to:-
START then select PROGRAMS then select ACCESSORIES then select SYSTEM TOOLS then SYSTEM RESTORE at which point it will come up with RESTORE YOUR COMPUTER TO AN ERLIER POINT, click NEXT then select a date when you know your last config was good, then keep selecting next untill it has finished.
If you have loaded any other software on you WILL have to reload it.
Hope that helps