I can provide the specific direct links or manual registry paths if the automated tool doesn't work!
Because Visual Studio 2012 is long past its primary lifecycle, official standalone links for the "Pre-Clean Tool" are rarely maintained as separate downloads on the main Microsoft site. microsoft visual studio 2012 pre clean tool download upd
Visual Studio 2012, Pre Clean Tool, Uninstall Utility, Download, Setup Cleanup, VS2012 Update. I can provide the specific direct links or