 Registering advanced system optimizer is easier than you think. First, launch advanced system optimizer. Then click on the register now button. Next, go to your email account that you registered with advanced system optimizer. You can find the registration email by searching for SIST week on search menu. Once you've located the email, open it to find your registration key. Copy the registration key from the email. Go back to advanced system optimizer license key window. Paste your license key. Click on activate now button. Congratulations! You have successfully registered advanced system optimizer. If you need any more information or questions please send us your queries on support.sistweek.com.