Windows 2008 server Backup with HyperV role fails

1. Either there is no space left on –at least one of your VMs. Please note that free space for correct vss working should be at least 1GB for vhds of 100GB of space.
2. Or at least one vss writer fails on one of your vms. Go back to step 1 and execute vssadmin list writers on every VM you have. At least one fails. On the one that fails (personally seen it on w2k3 Exchange VM were the Exchange Writer was on error) make a batch file containing the following (I have put some pauses in order to see who the procedure works out). Save the batch as whatever you like .bat and WATCH IT!!! Before Re-registering the vss and required dlls you have to switch your path to windows\system32!!! If you don’t, then the vss will not run actually and when you run vssadmin list writers nothing will come up. So pay attention!!!

Step1 :
Follow info on http://support.microsoft.com/kb/940349
Download and install update.
Restart

Step2:
Open Cmd and run vssadmin list writers
No error should appear.
Check if backup works (It is likely it won’t, instead of running the whole W2k8 Hypervisor backup, try backing up the current VM by it’s own NTbackup, try system state or any folder)
If it does not work proceed to step3:

Step3:
Regedit
Locate and export the following key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\EventSystem\{26c409cc-ae86-11d1-b616-00805fc79216}\Subscriptions
Export the key/folder somewhere in order to get it back if smt goes wrong
Now delete that key/folder (No worries Windows will recreate it)

Step4:
Restart each of the following services in that exact order:
– COM+ Event System
– COM+ System Application
– Microsoft Software Shadow Copy Provider
– Volume Shadow Copy
If one of the services is on stop mode, change the startup type to automatic and start the service

Step5:
Open Cmd and run vssadmin list writers
If errors still show up…go the last …step6

Step6:
Watch it you have to switch your path to windows\system32 – otherwise you will see no writes in vssadmin.
Make a batch copy-pasting the following:

Creativepeople.gr