To renew a root certification authority
- Log on to the system as an Administrator. 
 - Open Certification Authority. 
 - In the console tree, click the name of the certification authority (CA). 
- Certification Authority (computer) 
 - CA name 
 
 - On the Action menu, point to All Tasks, and click Renew CA Certificate. 
 - Do one of the following: 
- Click Yes if you want to generate a new public and private key pair for the certification authority's certificate. 
 - Click No if you want to reuse the current public and private key pair for the certification authority's certificate. 
 
 
Note
- To open Certification Authority, click Start, point to Programs, point to Administrative Tools, and then click Certification Authority.