how to handle open files

NBU 7.5.0.5, linux master/media server

Windows Server 2008 R2 client

from time to time i always get this errors and the only solution given to me was to restart the server so that the VSSwriters will get "reset". btw, the backup policy is for a BMR and i did tell the dba to shutdown SQL Server services.

is rebooting the only solution?

 

11/24/2014 15:10:54 - Warning bpbrm (pid=22773) from client test-obiee: WRN - can't open file: C:\ProgramData\Sophos\Sophos Anti-Virus\Config\interchk.chk (WIN32 32: The process cannot access the file because it is being used by another process. )
11/24/2014 15:21:54 - Warning bpbrm (pid=22773) from client test-obiee: WRN - can't open file: C:\System Volume Information\Syscache.hve (WIN32 32: The process cannot access the file because it is being used by another process. )
11/24/2014 15:21:54 - Warning bpbrm (pid=22773) from client test-obiee: WRN - can't open file: C:\System Volume Information\Syscache.hve.LOG1 (WIN32 32: The process cannot access the file because it is being used by another process. )
11/24/2014 15:21:54 - Warning bpbrm (pid=22773) from client test-obiee: WRN - can't open file: C:\System Volume Information\Syscache.hve.LOG2 (WIN32 32: The process cannot access the file because it is being used by another process. )
11/24/2014 15:29:35 - Info bpbkar (pid=3860) 90000 entries sent to bpdbm
11/24/2014 15:44:50 - Warning bpbrm (pid=22773) from client test-obiee: WRN - can't open file: C:\Windows\ServiceProfiles\LocalService\NTUSER.DAT.LOG1 (WIN32 32: The process cannot access the file because it is being used by another process. )
11/24/2014 15:44:50 - Warning bpbrm (pid=22773) from client test-obiee: WRN - can't open file: C:\Windows\ServiceProfiles\LocalService\NTUSER.DAT.LOG2 (WIN32 32: The process cannot access the file because it is being used by another process. )
11/24/2014 15:44:51 - Warning bpbrm (pid=22773) from client test-obiee: WRN - can't open file: C:\Windows\ServiceProfiles\LocalService\AppData\Local\lastalive0.dat (WIN32 32: The process cannot access the file because it is being used by another process. )
11/24/2014 15:44:51 - Warning bpbrm (pid=22773) from client test-obiee: WRN - can't open file: C:\Windows\ServiceProfiles\LocalService\AppData\Local\lastalive1.dat (WIN32 32: The process cannot access the file because it is being used by another process. )
11/24/2014 15:44:54 - Warning bpbrm (pid=22773) from client test-obiee: WRN - can't open file: C:\Windows\ServiceProfiles\NetworkService\NTUSER.DAT.LOG1 (WIN32 32: The process cannot access the file because it is being used by another process. )
11/24/2014 15:44:54 - Warning bpbrm (pid=22773) from client test-obiee: WRN - can't open file: C:\Windows\ServiceProfiles\NetworkService\NTUSER.DAT.LOG2 (WIN32 32: The process cannot access the file because it is being used by another process. )
11/24/2014 15:44:54 - Info bpbrm (pid=22773) from client test-obiee: TRV - last message being suppressed after 10 occurrences