Symptom:

When scanning a SFE or PVWA website using an SSL checker, you receive a low score

Cause:

This is caused by IIS supporting protocols with known hacks and or weak ciphers


Solution:
In order to solve the problem, in an easier way, please download the tool IISCrypto from the following link:
https://www.nartac.com/Products/IISCrypto

Run the software and set the configuration parameters according to the following picture:


After pressing apply, restart the server and re-scan the server to receive the new scoring.

More information can be found in the following link:
https://scotthelme.co.uk/getting-an-a-on-the-qualys-ssl-test-windows-edition/