Obviously Spyware Doctor DOES scan for cookies. That's what I reported in the first post. I DID indicate they are low risk according to Spyware Doctor, but that doesn't mean NO risk, again, according to them.
You didn't say they were cookies or low risk in your first post, just 43 problems that avast didn't prevent.
Cookies are non-executable text files and zero security risk, they don't store your username and password in plain text so even if something tried to look at them there is little of any use in there, they would also need to know the location and cookie name to even open it. So they pose only a minor privacy issue and contrary to their name they don't track you where ever you go. They are set on websites and they record your activity on that site only.
If in your browser you allow third party cookies (you shouldn't allow that) the cookies isn't from the actual site you are visiting, then you could have the activity recorede for other sites that also have this third party cookie.
By disallowing third party cookies you would block them, by using a browser like firefox you can also use an add-on like CookieSafe also.