Thanks it turned out the problem was that the directory that the Temporary Internet files were stored in no longer existed after the update to Windows 10. Trying to change this under the Control Panel application for Internet settings failed to change the directory as the one that it was trying to move the files from did not exist. The only way to correct the problem was to manually edit the registry key as explained here: https://msdn.microsoft.com/en-us/library/ms940828(v=winembedded.5).aspx