I noticed that Startup Tools (for S&D 2.5) is no longer working properly (it display a bland white screen) for Windows 64bit (must be after one of MS update as it used to work). I opened the program as admin. If I change the properties of SDTools to be windows 7 or 8 compatible then it does display the windows menu properly but the hour glass never finishes.
It also uses tons of cpu (~30% on a i7) so something may be stuck.