VSS SYSTEM FILESET ERROR

HI Guys,

can someone please help me with this error...

Im running v7.5.3 on a windows 2003 R2 server for file system backups.

all the drives are backed up except the VSS SYSTEM FILESET which gives the following error:

System Writer - ERROR: Failed to save FileGroup files, writer = System Writer
System Writer - Error saving writer System Writer
System Writer - ERROR: Aborting backup of saveset VSS SYSTEM FILESET: because of the error with writer System Writer.
System Writer - Error saving
7162:save: save of VSS SYSTEM FILESET:\ to (backup server) failed
:  File C:\windows\system32\winlogon.exe could not be opened and was not backed up. (Access is denied.)

I've googled the error but to no prevail have I found a fix.

I'm some of you guys have expierienced this before and hope you can give me a fix for this please.

Thanks & Regards!