I keep getting this error when trying to backup the system state of our domain
controller in an active directory domain. I also get this error on a server
that is running SQL server. Should i not try to attempt to backup these
computers or set them up differently?

I have installed service pack 1 for 9.0 and applied all the hotfixes.

If there is any other information anyone needs to help solve this problem
just let me know. Thank for all your help in advance.