I have a Windows Server 2012 R2 virtual machine; yes with all the updates. Additional software include Microsoft SQL Server 2014 (was 2012 on a previous VM). The web hosting company includes xenpci.sys (EJBPV XenPCI Driver (Checked Build), James Harper) as part of their default installation on all VMs and Plesk.
Periodically, the OS either hangs, blue screens, or reboots. I do get mini dumps, though not all the time. The usual problem is:
The specific top level file, obviously not the cause, varies: win32k.sys, ntoskrnl.exe, xenpci.sys (the Xen driver, though only showed up a couple of times), and ndis.sys.
The OSR (Open System Resources) analyzer was not of much help. The WhoCrashed analyzer was a bit more helpful.
17 crash dumps have been found and analyzed. Only 10 are included in this report. A third party driver has been identified to be causing system crashes on your computer. It is strongly suggested that you check for updates for these drivers on their company websites. Click on the links below to search with Google for updates for these drivers:
xenpci.sys (EJBPV XenPCI Driver (Checked Build), James Harper)
I tried to push the web hosting company to research the topic, but they can up empty handed. I am not convinced that the Xen drivers are at fault. WhoCrashed picked up on it, I presume merely because that was the last driver a couple of times and it is a third party, so that makes it guilty. I did not write WhoCrashed, so hard to comment further.
My question is how to troubleshoot the problem.
The web hosting company already tried giving me two new virtual machines throughout the last couple of years. The problem migrates. I installed SQL Server, but the OS and Plesk came by default. Okay, there is the mail server software too. The web hosting company also told me that they do not have other clients similarly complaining. They ran disk tests multiple times. Disk health is good.
I did not check the registry's health, but the problem goes across installations and happens pretty routinely, so I would have to discount that. I am on my third or fourth VM now.
Again, I mention Xen because WhoCrashed mentioned it, but I am not convinced that as the cause, and other clients really do use that. The system has adequate memory and storage, so that is not a problem.
UPDATE: Here are some answers from the web hosting company to my query.
In usual scenario, performance of the VM will get degraded once you uninstall the drivers. There might be some synchronization issues with the Hardware Node.
Am I using a checked or release build?
You are using a test-signed build, the same ones from developer's site.
How can I tell? The Xen PCI properties dialog in Device Manager did not say one way or the other. Is the entry in Device Manager the sole location? I checked in Programs and Features and saw nothing listed.
You can check the version under Add or Remove programs. Refer to the snapshot attached.
How/where I can I find where the latest version is on their site?
Developer's site is not working - http://www.meadowcourt.org/downloads/ You can donwload the latest signed releases from here - http://wiki.univention.de/index.php?title=Installing-signed-GPLPV-drivers
How can I tell which Xen, 0.11.0.373 belongs to (Xen 4.6? 3.0? x.y?)
We are using Xen 3.4.4, you can't see it from your VM. It can only be viewed from hardware node.
Update 2: The hosting company installed two James Harper software.
GPL PV Drivers for Windows EJB PV Drivers for Windows