Cannot can't open .svn\tmp\tempfile.tmp: access is denied

Hi  One of our user is getting this error during the update. http://blog.mxunit.org/2009/03/cannot-cant-open-svntmptempfiletmp.html, following this URL, I asked him to reboot his machine but still didn't fix. Any more suggestions?  I tried a hard restart – still had problems. I tried manually moving the files for which SVN was erroring out (on Access Denied) and I was able to manually move the files.   The problem seems to consistently be copying/moving the ‘entries’ file from the \.svn\tmp to \.svn and the error is ‘Access is denied’ even though I can manually copy/move the file.   If I keep running the update and keep manually moving the files SVN errors out on – eventually I can complete the SVN update. The problem returns later however when someone else makes a change in csl or csl-legacy.