System state backup on Server 2012 R2

Using the WSB utility, I get the following error "The process cannot access the file because it is being used by another process."

I ran the utility through powershell and got the same error.  I checked the log files and get this error "Error in deletion of [C:\System Volume Information\001.dat] while pruning the target VHD: Error [0x80070020] The process cannot access the file because it is being used by another process."

Looked at resource monitor and system constantly has access to the file.

Any help would be appreciated.

Thanks