You could have kept this with your other topic as it is basically the same.
As I said there:
Clearly not a false positive as it can a) restart your system and b) it is flagged as a PUP Potentially Unwanted Program. The restart function in the hands of a malicious attack would be one use of the tool, but in the case of SDfix would be if it is required to restart the system to remove in use malware, etc.
So you could chose not to do anything (block) since you downloaded it. It would of course be detected next time round, so you would have to exclude it from scan if you wish to keep it.
However, there is little benefit in keeping this tool lying around if you have used it, these types of tools should be downloaded before they are used (that way you have the latest version) if you suspect you have the infection it deals with.
Another point you are doing a custom scan as PUPs aren’t scanned for by default.
Well there is even more to add. Not for nothing it is advised before you run mentioned tool to turn off / disable your av scanner (because it could detect as possibly unwanted program in the case you did not willfully install it yourself), same goes for the other finds you mentioned in separate threads,
No problem, I have given a bit of information on how there are differences on the on-access and on-demand processing of detections in your other topic.
If sdfix.exe is outdated and ineffective, is there something I can revert to? And also the link to sdfix.exe is a 404; the file is no longer available. I got it from megaupload, but was flagged with appl/prcview.e by Avira. In the meantime, there’s still an undetected virus on my PC.