AhsayCBS (DIY)AhsayOBM Windows Backup Error 0x81000101: Shadow Copy Timeout
May 13, 2025
Product Version
AhsayACB / AhsayOBM: 7 and above
Operating System
Windows
Symptom
When performing a MS Windows System or System State backup, the following error message is displayed on the backup client interface, or in the backup report:
| No. | Type | Timestamp | Log |
| * | ... | ... | ... |
| * | info | ... | [ ... ] "The operation ended before completion." |
| * | info | ... | [ ... ] "The shared restore point operation failed with error (0x81000101). The creation of a shadow copy has timed out. Try this operation again" |
| * | erro | YYYY/MM/DD hh:mm:ss | [ ... ] "[Error]" |
| * | ... | ... | ... |
Cause
The error message suggests that the operation to create a shadow copy of the volumes being backed up has timeout.
Resolution
By default, the shadow copy creation timeout limit is set to 10 minutes. Try increasing the timeout limit on the affected computer to resolve the issue:
From Task Manager, run regedit
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SPP
Right-click on an empty space, click New, then DWORD (32-bit) Value with name CreateTimeout
Double-click on CreateTimeout, change the value to 1200000 (e.g. 2 * 10 * 60 * 1000 = 20 minutes) Decimal based
