Hi, As mentioned in many other threads I have similar but a little different problem with PD12.2 and Windows 10 (creators update - installed from scratch 3 days ago). At first after fresh install everything was working smoothly - I have one restore point (clean system & parallels tools), where system is starting normally. After installing everything that I use to work (Office 2k16, Visual Studio 2017, MS SQL management studio, tortoisegit) everything was working perfectly (3 days ago). But yesterday without any reason (nothing has been added/Installed, nothing has been changed in configuration - I only restarted machine increasing ram) the problem come back (I reinstalled previous installation because of the same symptoms): 1) Task scheduler won't start (error connected with UBPM.dll - no details at log at all). 2) Explorer freezing/crashing on startup - only solution to run it is to manually start ctfmon.exe (what for? on fresh install with tools only ctfmon is not running!) and force explorer to restart. After hour of freeze explorer start showing icons, but for example there is no battery icon (after lunching ctfmon & restarting explorer battery comes back). I tried every soultion with ctfmon (starting from adding it to startup list on autostart folder, using registry etc.), but ctfmon won't start on system startup. I also don't think, that ctfmon is necessary for normal system operation (as on fresh install it wasn't running). I'm not going to do another reinstall, because it is fresh install without any crapware, viruses etc. - it's clean with only needed software installed. In fact everything was working smoothly before weekend (I restarted machine several times and it was running great), and after weekend without ANY change after restart it hangs on explorer and come back to point with previous installation. If You want suggest option with ctfmon - please don't. It's not a solution, it's not working and I don't understand why You are suggesting sth that is only partial solution for some people. Reinstalling tools? Done several times. Nothing helps at all for now. Please investigate problem and find solution, because for now parallels is crap and is useless (maybe time to migrate to VMware back).