Have you tried the Intel® System Identification Utility?
- This can tell you the exact model of wireless card installed on the system, and refer you to the proper driver link.
Also, you may want to try performing a system restore from Windows*?, since it seems like a registry problem, rather than a hardware issue. This can restore the computer state to when it was working before.
Try going to "All programs", "Accesories", "System Tools" then to the "System restore" option. Choose a date when all was working before and start the process there. This might give you a hint on what's going on. If all fails, go ahead and ask the computer manufacturer for drivers, they can look them up using the model number of your system, telling you what's the right hardware installed on the first place.
All fixed. A friend suggested to use the original driver from Intel website rather than latest version. Now, I don't know if it was coincidence but Windows installed 51 updates in between my last post and my attempt to install the abovementioned driver. This install attempt actually ran, installed the software and everything's a go-go. Thanks for all the assistance.