Symantec Backup Exec error 'A Failure Occurred Reading An Object' , System?State

Recently my full backup jobs have been failing, the error stated is:

Backup- \\servername\System?State
V-79-57344-65247 - A failure occurred reading an object

I have looked myself but File System Asynchronous IO is enabled. And the AV the server uses has not changed from back when the jobs worked successfully.

This is BUE 2010 R3 64-bit running on Win 2008 R2 64-bit.  Target server is running Win 2008 R2 64-bit.

Also a secondary issue that I just now discovered:

I went to remove the erroring DC and add our second DC, when I go to push install the agent I get an error stating the destination doesn't have enough free space for the remote agent.  I look and the server has over 20gb free.  WMI is enabled and running and the account used to install is the domain's Backup service account that is a local admin.
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Ben HartAsked:
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jfletchsterConnect With a Mentor IT ManagerCommented:
Your free disk space issue would sound to me like a 'Permissions' issue, sounds like the account doing the install doesnt have permission to install applications or write to the installation location or temp location.
The first error looks like a VSS error, system state is usually read and written by a VSS read/writter. I would check the health of your vss running this command in a elevated Command Prompt and look for any errors:
vssadmin list writers
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Ben HartAuthor Commented:
There are no errors listed on any of the writers.
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Ben HartAuthor Commented:
the account I was using to perform that install had it's local permissions changed by another admin.
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