Well, it definitely is an OS problem. I created a new partition and a fresh install of Windows Home Premium. Wireless networks were detected on the initial install and all through the updates. So it would appear to not be a problem with a Windows update.

Nothing I try on the "bad" installation suggest any corruption or missing files. That includes chkdsk and File System Check (fsc). Virus scans come up clean.

If anyone can suggest something else to try I would be very grateful. The thought of reinstalling everything (it's a VB and SQL development machine) makes my head spin.

Nitram