HKCU\Software\Microsoft\Ntbackup\User Interface
| Data type | Range | Default value |
|---|---|---|
| REG_SZ | 0 - 32767 seconds (in decimal) | 30 |
Determines how long Backup waits for a file to be released when it is being used by another process. When the time specified by the value of this entry expires, Backup stops trying to back up the file and proceeds to other files.