If that was mine I would first use system restore to yesterday. If that fails I might consider installing the machines drivers again. You didn't supply the model so I was not able to see if these are at gateway.com

Think about how we have to install drivers after windows. Some are only learning this today since restore media does this for us. If we use the newer Windows 7 it does a fair job at drivers but we often find we have to install the motherboard chipset then audio and video drivers.

If this was mine, system restore first, then treat it like it was a new install and install the drivers in order.

As to the ! and troubleshooting, the results I get are 50/50. Let's say it is far from reliable.
Bob