I recently tried to DL and install the latest patches from MS on regular patch Tuesday. Avast popped up with rootkit warning for file trustedinstaller.exe. At the time, I was not aware of this file or it's use and deleted it. That action appears to have borked up my system, with at least one windows service unable to start. After reseaching the file in question, it would seem that it is a legitimate pat of the windows OS. Just curious to know how to go about fixing it.