If your backups fail with the following message :
Backup aborted! - Write operation failed - Insufficient system resources exist to complete the requested service
then it may be caused by your windows configuration. If so, the following steps may fix your issue:
1. Click 'Start' (then click 'Run' in XP), type 'regedit.exe' and press enter:
2. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SessionManager\Memory Management
3. On the Edit menu, point to New, and then click DWORD (32 Bit) Value.
4. Type PoolUsageMaximum as the entry name, and then press ENTER.
5. Right-click PoolUsageMaximum, and then click Modify.
6. Click Decimal.? In the Value data box, type 60, and then click OK.
7. Create another DWORD (32 Bit) value named PagedPoolSize.
8. Right-click PagedPoolSize, and then click Modify.
10. Click Hexadecimal. In the Value data box, type a value of FFFFFFFF, and then click OK.
11. Finally, Reboot and attempt to create another image.