Read Errors reported in backup

Hi Team,

We have IBM Tivoli Storage Manager version 6.4 installed and observed large no of errors in backup of File servers . While checking the error logs found "Thumbs. dB" files on which read errors reporting. My File servers are Windows 2012 and i want to prevent creation of such files on server. 

How do i prevent it? Is there any way i can restrict creation of file from Group Policy? Kindy suggest.

Thanks

Hitendra 

TSM Backup Admin