I've been trying to solve this problem since a few days now without any success. What I'm trying is to make a backup of a virtual machine running Windows Server 2003 SP 2 using VMware Data Recovery 2.0.0.1861. When starting the backup task it tries to make a snapshot of the virtual machine using VSS which fails with error:

Event Type: Error
Event Source:   VSS
Event Category: None
Event ID:   8193
Date:       05.06.2012
Time:       12:12:01
User:       N/A
Computer:   LEGOLAS
Description:
Volume Shadow Copy Service error: Unexpected error calling routine RegSaveKeyExW.  hr = 0x800703f8.

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Data:
0000: 2d 20 43 6f 64 65 3a 20   - Code: 
0008: 57 52 54 52 45 47 52 43   WRTREGRC
0010: 30 30 30 30 30 33 39 36   00000396
0018: 2d 20 43 61 6c 6c 3a 20   - Call: 
0020: 57 52 54 52 45 47 52 43   WRTREGRC
0028: 30 30 30 30 30 33 31 38   00000318
0030: 2d 20 50 49 44 3a 20 20   - PID:  
0038: 30 30 30 30 36 34 38 38   00006488
0040: 2d 20 54 49 44 3a 20 20   - TID:  
0048: 30 30 30 30 34 33 38 34   00004384
0050: 2d 20 43 4d 44 3a 20 20   - CMD:  
0058: 43 3a 5c 57 49 4e 44 4f   C:\WINDO
0060: 57 53 5c 53 79 73 74 65   WS\Syste
0068: 6d 33 32 5c 76 73 73 76   m32\vssv
0070: 63 2e 65 78 65 20 20 20   c.exe   
0078: 2d 20 55 73 65 72 3a 20   - User: 
0080: 4e 54 20 41 55 54 48 4f   NT AUTHO
0088: 52 49 54 59 5c 53 59 53   RITY\SYS
0090: 54 45 4d 20 20 20 20 20   TEM     
0098: 2d 20 53 69 64 3a 20 20   - Sid:  
00a0: 53 2d 31 2d 35 2d 31 38   S-1-5-18

This machine was converted p2v. I have no idea where to search for the problem and what to do. Google showed a few result but none of them were useful for me. Please help me. If you need further information I'll tell you - just ask!