Please unload Mslo64.sys preventing launch
J
Jackson_Boof
Began receiving this error today. Work around found with going to System32 drivers folder and renaming/removing Mslo64.sys (renamed to Mslo64.sys.old).
Searches are showing that this file is associated with certain RGB lighting software. This appears to be a false flag by EAC.
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Star-Max
My friend is having the same issue, but no such file exists on their PC.
C
Chazv
Star-Max +1 on this. I also have this issue and couldn't find that file on my PC
Tried to uninstall RGB software, but get another .sys error alert instead
WubTheCaptain
Chazv In your scenario on VRChat Ask forum (https://ask.vrchat.com/t/launch-error-vrchat/48969), you admitted to having ASRock Polychrome RGB installed which was giving you launch errors due to vulnerable
MsIo64.sys
(CVE-2019-18845) and AsrDrv104.sys
(CVE-2020-15368) drivers.I have to emphasize EAC is doing the correct thing by blocking the launch while these drivers are loaded.
WubTheCaptain
Not a bug, and not a false flag. A vulnerable driver with arbitrary memory read/writes (CVE-2019-18845).
WubTheCaptain
Jackson_Boof I think VRChat not loading with
MsIo64.sys
is the least of your concerns here, and the workaround of renaming the driver file is worse than upgrading or uninstalling the vulnerable software you were using.