In order to obtain full optimization using Registry Booster, you have to perform two tasks:
1) First you need to scan the registry and fix any errors reported
2) Then you need to defrag the registry
In order to defrag the registry, please follow these steps:
1) Open Registry Booster
2) Click on the "Registry Scan" tab
3) From the left menu, click on "Registry Defrag"
4) Click on the "Defrag Registry" button in the lower right corner