You administer a Windows 8.1 computer that runs Hyper-V. The computer hosts a virtual
machine with multiple snapshots. The virtual machine uses one virtual CPU and 512 MB of
RAM.
You discover that the virtual machine pauses automatically and displays the state as
paused-critical. You need to identify the component that is causing the error.
Which component should you identify?
A.
Insufficient hard disk space
B.
Insufficient number of virtual processors
C.
No virtual switch defined
D.
Insufficient memory
If the free space falls under 2 gigabyte we will start to log warning messages in the event log.
*** If the free space falls under 200 megabyte we will pause the virtual machine and mark it as “Paused-Critical”. ***
Once a virtual machine snapshot has been taken – the base virtual hard disk stops expanding and the snapshot file stores new data that is written to the disk – so it is critical that there is enough space in the snapshot storage location.
http://blogs.msdn.com/b/virtual_pc_guy/archive/2009/04/22/why-is-my-virtual-machine-paused-critical-hyper-v.aspx