Mine stopped working and nothing helped. I did as advised. I uninstalled Support Assist. Before reinstalling I used  CCleaner which is free and safe to use. I cleaned out the registry that had some files left after uninstalling . I reinstalled and it works like it did before.
I have a couple of Dell Precision M6600s on which I continually receive the notice that supportassistui has stopped working. Both machines run Windows 7 64 bit. I've tried googling and searching this forum but don't find how to fix this problem. Please can I get some help on what to do?
SupportAssistUI Stopped Working