Can I delete file NTUSER.DAT {xxxx}.TM.blf / .regrants-ms? safe or not?

Hi guys,

I have user account for winimage backup and runing on windows server 2008. But every Windows backup running, it created Log is like NTUSER.Dat {xxx}.TM.TM.blf / .regrants-ms. That is why on my drive C: was log's growing up(C:\user\winimage.backup)

Can i delete those file as normally? or another way?

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thanks