Sorry for the lack of updates but found another good guide at PCBugSquad.com:
THe USS.exe Trojan is an executable that gets installed on your computer along with other malware. This infection will also install a service called wasfsd that uses the filename C:\Windows\System32\drivers\System32. When running, this Trojan will display fake alerts that state your computer is being attacked or is infected with particular infections. It will then ask if you would like to block or fix these infections, and if you specify yes, will open up an Internet Explorer window where it prompts you to buy Trusted Antivirus.
Source: How to remove the USS.exe Trojan
Filed under: General Security