I have a 3-user license for NOD32 for 3 years starting August 5th 2006 but this morning one copy won't update and is giving the following message -- You have been using this trial version for 43 days after the 30-day evaluation period. Further updates will not be possible. Please uninstall the program, or purchase a full version of NOD32. The context menu for scanning in Windows Explorer has also stopped working with a similar message. NOD32 is running fine on one of the other PCs. The third PC is at another location so I'm unable to check it at the present. Can anyone suggest what might be causing this and how to fix it?