Monitor File Changes On Windows System

Grab Handle.exe (http://technet.microsoft.com/en-us/sysinternals/bb896655.aspx) and, on the server computer, run a "handle -a" redirecting the output to a text file. Search that for the affected filename. That should at least tell you what process on the server computer has an open handle to the file. I'd be interested to know what process has a handle to it. (I'm wondering about anti-virus software as a possibility...)

My condolences for having to deal with GlobalShop, BTW.

Edit:

McAfee VirusScan 8, eh? Have a look at this: https://kc.mcafee.com/corporate/index?page=content&id=KB52156

It refers to Microsoft Office files, but it sounds suspiciously like it could affect any type of file. See also:

http://forums.mcafeehelp.com/showthread.php?t=223545

http://www.tek-tips.com/viewthread.cfm?qid=1453943&page=1

https://web.archive.org/web/1/http://techrepublic%2ecom%2ecom/5208-6230-0.html?forumID=101&threadID=207897&messageID=2632853

This question is very old but I still wanted to add my bash only solution as I was just searching for one when I came here. The grep tar in the listing command is just for my own purpose to list only tar files, can be adapted of course.

RESULT=`echo "ls -t path/to/old_backups/" | sftp -i ~/.ssh/your_ssh_key user@server.de | grep tar`

i=0
max=7
while read -r line; do
    (( i++ ))
    if (( i > max )); then
        echo "DELETE $i...$line"
        echo "rm $line" | sftp -i ~/.ssh/your_ssh_key user@server.de
    fi
done <<< "$RESULT"

This deletes all tar files in the given directory except the last 7 ones. It is not considering the date though but if you only have one backup per day it is good enough.