i have windows xp with service pack 2.i did the update this weekend & had grouper (a file sharing program) on my computer(which is a dell 2400).my device manager is now showing blank as is my network connections & my dialup modem isn't showing either. but most my hardware is working fine.is there a way to fix my computer & if so-how do i do it? plus my antivirus froze up to.i use mcafee.
   thanks,
   Rose E McClain