This article is intended for Citrix administrators and technical teams only.
Non-admin users must contact their company’s Help Desk/IT support team and can refer to CTX297149 for more information.
 

"AddOrRemoveSSONProvOrder: Could not open key for access."

Caution! Using Registry Editor incorrectly can cause serious problems that might require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. Be sure to back up the registry before you edit it.

Uninstalled traces of Receiver using Receiver Cleanup Utility.

Checked HKEY_LOCAL_MACHINE\SYSTEM\Services\PnSson.
This key cannot be removed or accessed or read.

Checked HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\NetworkProvider\Order
and set "ProviderOrder"="RDPNP,LanmanWorkstation,webclient,PnSson"

Restart client machine and attempt to install receiver.
Receiver 4.4.1 installation was successful.

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Problem Cause

PnSson service key was inaccessible due to permission issue.

Unable to install Receiver 4.4.1. Error: "AddOrRemoveSSONProvOrder: Could Not Open Key for Access" While Installing Receiver 14.4.1