[BigJohn]

Not sure if I have a specific answer for your problem... many things could cause this.

If you're running Windows XP or ME (something that includes system restore) you can often restore to a point prior to the problem and have it corrected. This can be a pain if you've installed or un-installed a lot of stuff recently.

Another thing you can try is to completely remove all network drivers, reboot, then install them again.

Both of these options have solved similar problems for me at one time or another.

Hope this helps.