Exception 0xc0000420

[jcgriff2]

Anyone ever come upon exception 0xc420 - "concurrent BIOS calls"?

Dozens (?? - EST) of new Lenovo systems involved; single system image deployed; some are BSOD'ing.

Bugchecks are always the same - either 0x7e (thread threw an exception) or 0x3b (system service threw an exception).

The exception on ALL - 0xc420

Periodic BSOD 0x7E During Bootup - Windows 7

Some hardware experts have told me that it may be caused by board revisions -- see explanation at end of post #13 -

Periodic BSOD 0x7E During Bootup - Windows 7 - post #13

Thanks,

John

 

[Patrick]

Ask for a kernel dump, preferably with verifier enabled. Can hopefully pinpoint a bug.

 

[jcgriff2]

Verifier ran, but no BSODs, unfortunately.

 

[x BlueRobot]

I thought Lenovo systems had some security flaw -- https://www.sysnative.com/forums/ge...ity-advisory-execution-of-arbitrary-code.html