If you see this error message:
Please visit the iLok Windows Troubleshooting page where you will find the options shown below.
Click the last strip that reads The iLok License Manager is working, but after a few reboots, the iLok License Manager stops working
This will take you to a section called
Diagnosing PACE License Services Failures on Windows
Please follow the steps in this section; they have helped many Customers resolve this issue before.