title: Git: Can't push from one computer
body: <p>One of my coworkers is having a problem pushing changes from git on his machine.  If he logs into another machine, he can push just fine - but from his machine, when he tries to push he gets the following error</p>
  
  <pre>
      D:\Projects\test1\best-practices>git push
      Counting objects: 4, done.
      Compressing objects: 100% (2/2), done.
      Writing objects: 100% (3/3), 273 bytes, done.
      Total 3 (delta 1), reused 0 (delta 0)
      error: unable to create temporary sha1 filename ./objects/42: Permission denied
  
      fatal: failed to write object
      error: unpack failed: unpacker exited with error code
      To //civ3s012/gitrepos/best-practices/.git
       ! [remote rejected] master -> master (n/a (unpacker error))
      error: failed to push some refs to '//civ3s012/gitrepos/best-practices/.git'
  </pre>
  
  <p>The server is a windows machine, as is the client.  No one else is having this problem - it seems to be a server permissions issue, but we've ruled that out as far as we can tell.  Also, the fact that he can log into a different machine and push, using the same username, makes it seem like it's not server permissions.  Any ideas what could be going wrong here?</p>