Systems running Symantec Endpoint Protection Small Business Edition cloud (SEP SBE) periodically experience a Blue Screen with BugCheck 0x27, with a crashing module of mup.sys. This is observed when users log into the system, or while using applications that access resources over Windows filesharing.
Windows 7 64-bit
SEP SBE .Cloud NIS version 22.8
Users see a Blue Screen crash with BugCheck 0x27, referencing mup.sys as the crashing module.
This crash has been associated with SEP SBE .Cloud NIS version 22.8.
This issue is resolved in srtsp64 driver version 22.214.171.124 and later.
Systems running Windows 7 Pro SP1 64-bit received srtsp64 126.96.36.199 through a targeted LiveUpdate package released on March 1st, 2017, it upgrades the srtsp64 driver to version 188.8.131.52. All editions of Windows 7 64-bit received srtsp64 184.108.40.206 through NIS version 22.9.3.
To verify that the fix has been applied to a system:
In a text editor open C:\Windows\System32\Drivers\NISx64\%VERSION%\srtsp64.inf where %VERSION% is the highest numbered folder. The line with the text "Driverver" will reflect version 220.127.116.11 or later.
ID: 4018380, 4047523
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