Why is System Restore terminated?

Even if there is sufficient disk space, an error message appears.
Err Msg: System Restore is suspended because there is not enough disk space available on the system drive (drive letter). To restart System Restore, ensure at least 200 megabytes (MB) of free disk space are available on this drive. Do you want to start Disk Cleanup to free more disk space now?

Microsoft® has verified that this symptom occurs in the following environments.
* When the free space of the drive other than the system drive becomes less than 50MB (when the system on that drive is enabled)
* When executing the above drive with copying, deleting or changing which was monitored by System Restore

To resolve the symptom, turn off System Restore on the non-system drive with the steps below.
1. Click Start, point to Settings and click Control Panel. Then click Performance and Maintenance.
2. Click System and click System Restore.
3. Click Drive Settings and select the necessary drive in Available drives:. Then click Setting.
4. Deselect the Turn off System Restore on this drive option.
5. Click Yes.
6. Click OK.

Alternatively, using Disk Cleanup to increase the free space of the non-system drive.

For more information, please refer to the relevant solution in Microsoft technical support website.
Article ID: Q299904
Last Reviewed: October 18, 2001
Title: The System Restore Utility May Be Suspended on a System Drive Even Though There Is Enough Disk Space.