An error occurred saving the registry key.
The active registry key cannot be copied to the ADSM.SYS staging directory.
The registry backup operation stops.
Check the space available on the Windows boot partition to ensure there is room to contain a copy of the Windows registry. This might require several megabytes of free space. Also check the Windows permissions on the ADSM.SYS staging directory and ensure that the Windows user which you are using to run TSM has full access to that directory and its contents.