When starting the XDB server under control of the task scheduler, by default, the task scheduler gives the XDB server a background process priority. This is not the case in Windows 7, so this needs to be changed. In order to create a compact backup using the task scheduler in Windows 7 follow these steps:

1. Create the task
2. Right click on the task and "export" it
3. Edit task.xml that you just exported
4. You will find a line similar to 7
5. Change the value to a normal priority (between 4-6). A table of potential values are here
6. In the task scheduler, delete the task you initially created
7. In the task scheduler, in the action area, import the task from the XML file