I am affected by the same issue. Exactly the same.
A crappy video showing the phenomenon:
Windows version: 1703 (OS Build 15063.332)
VM Software: Parallels Desktop Pro 12.2.0 (41591)
This setup has been running fine for months (W10 on PD Pro 12, obviously with the occasional updates) until recently, and without any installation of additional software, except for updates of W10 and PD, login slowed down significantly.
1) Cold boot of the VM to the sign-in screen is still fast.
2) Entry of sign-in information using the keyboard is still fine
3) After sign-in, the desktop instantly appears as before, _however_ issues start at this point:
- the task bar will flash frequently
- The Cortana search box in taskbar shows a flashing and/or wrongly aligned microphone icon
- Trying to open start menu via mouse click or Windows key causes the entire desktop to flash
- Hovering the taskbar shows the circular busy icon
- While all this happens, CPU load is low, memory usage is low
- Apps with shortcuts on the dektop can still be opened as fast as before
- Ctrl+Alt+Delete can be used to bring up task manager and 'Run' can be used from there to start software
- While all of the above happens, no typing is possible in any modern app such as e.g. the Edge address bar or any other text input field. Typing in cmd.exe or other classic apps continues to work
- In the Event Viewer I can also see Task Scheduler cannot start due to a 'ubpm.dll' related error:
View attachment 12624
At this point I am assuming that 'ctfmon.exe' is simply not running properly because task scheduler has issues.
I have also
posted about this on the Microsoft Community forums , no useful answers there yet.
I have also been in touch with Parallels support (ticket #2410673) but other than the usual attempts:
1) Try and create another user to see if the issue exists
2) Try and do a re-install of the OS
Nothing useful was done and no useful feedback was given (I don't blame the support guy, this is something for the development team and most likely Microsoft people).
I prepared a report with ID 188829240 although the technician also created one for the ticket referenced above.
That being said, I would really like to see a solution materialise, this has taken too much of my time already.
Update:
Running system scan (sic /scannow) did not turn up issues.
Update 2:
After re-opening my support ticket referenced above, clearly mentioning this thread (to show I am not the only person affected), I was once again told to 'refresh the OS' while it is clear that will not help.
Quite a frustrating experience: Parallels costs quite a bit of money, as does a W10 license and yet, the best support you seem to ever get is 'wipe your machine and install again', ugh...
Click to expand...