jcgriff2 Co-Founder / AdminBSOD Instructor/ExpertMicrosoft MVP (Ret.) Staff member Joined Feb 19, 2012 Posts 21,541 Location New Jersey Shore May 18, 2015 #1 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
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
P Patrick Sysnative Staff Joined Jun 7, 2012 Posts 4,618 May 18, 2015 #2 Ask for a kernel dump, preferably with verifier enabled. Can hopefully pinpoint a bug.
jcgriff2 Co-Founder / AdminBSOD Instructor/ExpertMicrosoft MVP (Ret.) Staff member Joined Feb 19, 2012 Posts 21,541 Location New Jersey Shore May 18, 2015 #3 Verifier ran, but no BSODs, unfortunately.
x BlueRobot Administrator Staff member Joined May 7, 2013 Posts 10,193 Location %systemroot% May 19, 2015 #4 I thought Lenovo systems had some security flaw -- https://www.sysnative.com/forums/ge...ity-advisory-execution-of-arbitrary-code.html
I thought Lenovo systems had some security flaw -- https://www.sysnative.com/forums/ge...ity-advisory-execution-of-arbitrary-code.html