If you are using the Microsoft Dynamics CRM Online Outlook Client, it is a good practice to check for updates on a regular basis.
You can check for updates using the "Check for Updates" menu item or from the Start >> Microsoft Dynamics CRM >> Update:
However, on a few Vista and Windows 7 computers, the Microsoft Dynamics CRM Online Monthly Update doesn’t install and repeatedly prompts being available even after the user had applied the update and rebooted the PC (even performed the CRM Diagnostics):
The resolution for this is to run the "Update" program again as administrator "Run as administrator". Administrative rights on your PC are required to install the update.