frxsvc service transaction timeouts

Thomas Mora 6 Reputation points
2020-12-17T17:22:18.16+00:00

We are seeing the following service timeout errors. When they start occurring it seems no users are able to login.

A timeout (120000 milliseconds) was reached while waiting for a transaction response from the frxsvc service.

The FSLogix event logs show these errors

WTSQueryUserToken (The system cannot find the file specified.)
OpenVirtualDisk (The chain of virtual hard disks is inaccessible. The process has not been granted access rights to the parent virtual hard disk for the differencing disk.)

It seems to have started after the November Microsoft updates. Anybody else having similar issues?

Windows for business | Windows Client for IT Pros | User experience | FSLogix
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  1. Moreno Sanz Ivan (BSH GDS-PWV3) 0 Reputation points
    2025-11-13T15:48:54.48+00:00

    Hello, I'm now facing this problem since 1 month ago. My last updates are

    Description HotFixID InstalledBy InstalledOn


    Update KB5066139 NT AUTHORITY\SYSTEM 10/16/2025 12:00:00 AM

    Security Update KB5066782 NT AUTHORITY\SYSTEM 10/16/2025 12:00:00 AM

    Security Update KB5066781 NT AUTHORITY\SYSTEM 10/16/2025 12:00:00 AM

    Im also in a citrix environment were we are streaming a master vdisk with PVS.

    My issue is also random but consistent. We have to take on average 2-3 servers offline a day with this issue from a pool of 20 servers.

    Our FSLogix version is 3.25.626.21064.

    Thanks in advance!

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