(Please note: Just sharing this since I have seen occurring frequent BSOD on few of 32 bit Windows 2008 servers running on VMware, where VMware tool and VM hardware version latest. Please consider this as a solution only if memory dump analysis match with dll or EXE below and with same OS version, )
Issue: Blue Screen (BSOD) with driver Error 0x00000050 due to Ntkrnlpa.exe and Ntoskrnl.exe
Indentify driver or DLL causing the issue : this is the major and foremost task to troubleshoot Blue Screen crash on Windows servers the
You may use “BlueScreenView.exe” (http://www.nirsoft.net/utils/blue_screen_view.html) to view what caused the last BSOD or all previous ones.
Cause: As per MS below version of Ntkrnlpa.exe and Ntoskrnl.exe on windows 2008 server, are prone to get BSOD since the registry subsystem unmaps a view that is being used when the registry is large and when memory contention occurs.
FIX: As suggested by Microsoft download and apply the host fix http://support.microsoft.com/kb/2709236” and reboot the machine.
“From the memory dump analysis that we have done, the error bugcheck code was 50. The error is Bugcheck 50 – PAGE_FAULT_IN_NONPAGED_AREA.
Rule Triggered: Hotfix available: 0x00000050 Stop error when Windows tries to back up registry hives on a computer that is running Windows Vista SP2 or Windows Server 2008 SP2
Internal Link: http://support.microsoft.com/kb/2709236
After Upgrade the file versions should upgrade to