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I have a windows 2008 R2 server and I now installed a new bigger HDD into it. I wanted to copy big AVI files to the new server hdd what is shared on the local network. I have write access to the servers hdd and I can successfully copy smaller files to it. But when I copy bigger files more than 500MB randomly on the copy I get Access Deny message. If I use RDP I can copy files through RDP client. I checked error messages at the server but I didn't found any error about this access deny. Because of RDP copy works I don't think that this could be hardware error. I think this is some kind of software setting error. Someone has faced this kind of error? Or somebody has idea what could cause or how to find the root of the problem?

UPDATE: I checked that the virus scanner on the server maybe makes the conflict but the answer no. Not he virus scanner is the root of the problem

UPDATE: I made a test. I copied the files using the server source is my machine trough network. It worked. Only using other computer is the problem.

QUESTION: I think there is some service or application tries to view into the file while I coping this could anser why randomly stops. How could I check which process is trying to access that folder to determine which application blocks the copying?

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Just an idea: could it be a virus scanner that is interfering in some way? –  JoHel Nov 23 '12 at 21:24
Yes it is not a bad idea there was an avast server on the machine but I disabled it and now it not working neither. –  The King Nov 24 '12 at 11:41

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