Recently, I downloaded Service pack 2 onto my laptop computer running Windows XP. It ran fine the next day, but the day after that my wireless stopped working. I am using a WPC54G, and I'm not sure what course of action to take at this point.
Hmmm... best idea for that would be to contact the maker of your Wireless System. Ask them about the problem; and see what they have to say about SP2. if they say nobody has got it working on SP2 - Roll Back the Installation with System Restore.