Have NIS 3-user license

Hi!

 

I have NIS 3 license, loaded it on 3 systems: A Dell Inspiron, a HP Pavilion and a Sony Vaio GRT- 250.  A few weeks ago, the Vaio crashed and I tried a re-install to no avail. In the end the Vaio was a complete loss.

 

Problem is the license shows as being used-and I've replaced the Vaio with a netbook.

 

What do I do?