Hello,
As you are running a free version of Spybot you have to run the scans and immunization manually.
Such features as the scheduler or live protection are only available in the Home Edition or higher.
Please see this
comparison chart.
If you open the immunization or the scan from the Start Center please make sure you always do that with a right click and choose
"run as administrator".
About the "ad" I'm not sure that is something that Spybot can help with as Spybot is not an ad or pop-up blocker as such but an anti-spyware tool.
Best regards
Sandra
Team Spybot