Bluesceen Windows Server 2022 FASTFAT.SYS / ntoskrnl.exe

Mike 1 Reputation point


we are testing Windows Server 2022 for our Servers

with different Hardware setups

But on all Systems we get after few days/hours always a blueescreen

We Updated Windows, Drivers and Bios already.

on server 2016 its running good with no problems


any ideas?

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  1. Thameur-BOURBITA 32,596 Reputation points


    Check with the hardware vender if the server supports Windows 2022. The vender should help you to get the right version of driver if the hardware support Windows 2022.

    Please don't forget to mark helpful reply as answer

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  2. Jim Gandy 121 Reputation points

    Are there any updates on this issue from Microsoft?

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  3. anotheruser 0 Reputation points


    We are having same issue on Hyper-V Cluster with 2 nodes (Dell PowerEdge R750) on Windows Server 2022 with 2023-11 updates.

    Memory.dmp always points to same problem with fastfat.sys error 23 with process name vmms.exe like described in first post.

    Does Microsoft is aware of the problem ?


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  4. Papp Károly 106 Reputation points

    Hello All,

    We also have the same issue on the same Dell R750xs, Windows Server 2022, and with the Hyper-V cluster role installed, which sits with a Dell ME5024. All Dell fw/sw are up-to-date.

    The only difference is that we have the December 12, 2023—KB5033118 (OS Build 20348.2159) patch installed.

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