Lost dial up connectivity

A friend of mine with an e-machine running XP sp2 had a virus detected by AVG. AVG indicated it had to shut down to clear the virus. He did so but since rebooting gets to the stage in his walmart connect where it indicates talking to network. At this point it proceeds no further.It does not lock up it just never progresses. I have checked drivers and reinstalled the walmart software. Even worked thru with the walmart people to verify their software is in right. At this point I am not surte where to go next. Any recommendations welcome. The system will not allow me to restore to before the virus even thoug it show restore points. It goes through the motions then tellls me it cant do it. All suggestions welcome.