Evaluation Period Expires

Although i did not use an exluation copy of the NT Server CD, i am now recieving an system log error :
The eval. period of this install of NT has expired. The system will shutdown in 1 hr. To restore access to the install please upgrade using a licensed distribution of this product.

Q173507 mentions the fact that i could have used eval. copies of the NT Startup diskettes, which i didn’t.

Any ideas other than re-installing NT would be a great help.

Dave