These rootkit infections are getting really stubborn, and removing them can be a real challenge.  On a computer infected with both Zero Access and SST rootkits, once removed, Windows 7 would begin to boot only to get a blue screen with a "Stop 7B" error.

Rootkits many times affect the Master Boot Record and the Boot configuration of the computer, and the SST rootkit is otherwise known as a "Bootkit" affecting the boot record and wreaking havoc many times when removed.

In my case, other methods to restore the boot record failed.  However, I ran across the instructions to completely rebuild "BCD" (the Boot Configuration Data file) on the machine.  Here's the steps I followed  (hat tip SyntaX's Blog)

Recently worked on a Dell Inspiron 1525 that couldn't see any available wireless networks.  It had a switch on the side called a "WiFi Catcher", and the WiFi Catcher would show the wireless networks, but not allow you to connect to them.

The Dell Wireless Utility would throw the following error when opened, "The wireless network adapter could not be accessed.  This application may have diminished functionality as a result."

When you opened the Windows wireless "Connect to network" window, the dropdown box next to "Show" at the top was empty and no wireless networks would show up.

Researching the issue, there was everything from checking the WLAN AutoConfig service to a Vista Service pack update causing the problem, but trying everything encountered in research didn't seem to resolve the issue.