Coherence mode fails after updating to Windows 8.1

[SpuriousTuple]

I have a MacBook retina running OSX Mavericks. I'm using Parallels Desktop 9 to run Windows 8. I updated Windows 8 to Windows 8.1, and suddenly Coherence mode stopped working. Is anyone else having this problem? I'm not running multiple monitors.

 

[Parallels User]

I'm having the same issue with my MacBook Air. I've tried reinstalling the Parallels Tools, but nothing changes.

 

[Andrew@Parallels]

Hi All,
If regular Parallels reinstall doesn't help, please perform a clean reinstall as suggested at http://kb.parallels.com/8969 (make sure to clean it from registry as described in "Uninstall, clean up, delete temporary files & install Parallels Tools" section).

 

[sjc]

Mine was a clean install (8.1 vl disk) into a brand new VM but running Parallels 8 on 10.9.
Still has the same issue. Coherence mode non-functional, black windows and scrambled contents.

 

[SpuriousTuple]

I had seen the advice given in KB article 8969, but I ignored it because the article states that it applies to Desktop 5 and 6. I assumed that it was an old article and wasn't relevant because I'm running Desktop 9. If that article is still relevant to Desktop 8 and 9, please update it to say so.

I ended up creating a new VM with an ISO image for Windows 8.1. Coherence mode works fine on this new VM with Parallels 9 on 10.9. I deleted the old VM.

 

[PaoloLaMalfa]

Same issue , but not only coherence, the problem is related to the whole video section , multiscreen not working and also autoresizing of the screen resolution is looked.
the parallel support requested to remove and reinstall the parallel tools , but unfortunately the reboot after the un-installing crash the system , and i have to restore a previous set point

 

[JonnyQ23]

I just installed Parallels fresh with a previously installed Windows 8.1 bootcamp. Coherence doesn't work. Crashed once. Gray screens without info other times. Hasn't worked with a single program.