citrix receiver error 1046 the virtual driver is not loaded

On one of our Windows 7 pc's we get the error: This version of Citrix Receiver does not support selected encryption. Please contact your administrator. (error 1046: the virtual driver is not loaded)

The error happend over night, no idea what the cause is.
I tried reinstalling the Citrix receiver (13.1.0.89), but same result. Even used the Citrix ReceiverCleanupUtility to remove all registry settings concerned and installing again: same result. Tried the latest version of the Citrix Receiver: same result.

Funny thing is: I have about 40 pc's all running the exact same configuration and Citrix receiver version, but we (luckily) only have this problem on one pc.

I also tried a system restore to an image from a couple of days ago when everything worked, just to rule out any windows update errors: same result.

Any ideas how to fix this? (other than a complete reinstall of the pc)

regards,

Frank
Frank RuttenSystem AdministratorAsked:
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Sekar ChinnakannuStaff EngineerCommented:
did you tried to change the registry as mentioned in this discussion http://discussions.citrix.com/topic/329481-the-virtual-driver-is-not-loaded/page-2
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Frank RuttenSystem AdministratorAuthor Commented:
Yes, but on my pc the value mentioned in that discussion [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\ICA Client\Engine\Configuration\Advanced\Modules\ICA 3.0]
 "VirtualDriverEx"="

is empty, so I cannot remove anything from it.
Thanks for your reply.
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Sekar ChinnakannuStaff EngineerCommented:
is it happening one user on same machine or all the users who ever log in
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Frank RuttenSystem AdministratorAuthor Commented:
It happens to all user on this machine.

I'm getting the idea that there are more problems going on on this system. Now I'm having trouble opening event viewer...
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Sekar ChinnakannuStaff EngineerCommented:
hmm its seems to be an issue with the system itself and it cause issue with all the tools. If possible try with clear image and check.
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Frank RuttenSystem AdministratorAuthor Commented:
yes, I am going to reinstall the whole system, thanks for your help.
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