Hello Donka,
Thank you for the reply.
I used the same guide.
Unfortunately Local computers store does not come under Trusted Root Certification Authorities when I want to install certificate as mentioned in step 7.
"7. Expand the Trusted Root Certification Authorities store and select the Local Computer store below it."
I used mmc and add snap-in Certificates and installed the certificate to Local Computer certificate store as seen below.
Stil certificate does not come on login screen.
Regards,
Yuksel AKCINAR