Server crash, kernel power

Sorry if in wrong section, basically we have just had one of our servers virtualised on to another server. So its running 24/7, however recently, roughly every week it keeps crashing and getting the following error.

Log Name: System
Source: Microsoft-Windows-Kernel-Power
Event ID: 41
Level: 1
Task: 63

The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

The Details tab shows the following information:

BugcheckCode 1
BugcheckParameter1 0x774404ea
BugcheckParameter2 0x0
BugcheckParameter3 0xffff
BugcheckParameter4 0xfffff88007124ca0
SleepInProgress false
PowerButtonTimestamp 0

I cant think of anything that is triggering it other than the VMWARE, but why would it cause it and how to solve it

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More about server crash kernel power
  1. What Server version are you using? 2008 R2?

    Have you recently added any hardware? What was the last thing that happened before this started happening?

    Have you had any brownouts or black outs?

    I'm guessing you already do, but do the servers have proper UPS's?

    If event 41 is logged because power to the computer was interrupted, you may want to consider obtaining an uninterruptible power supply (UPS) such as a battery backup power supply. Maybe an underpowered or failing power supply caused this behavior. For example, if you added RAM or additional devices or hard disks when this problem began, the power supply may be a cause of the problem.
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