wow...i just downloaded yahoo toolbar and yahoo instant messenger to see if i could have the same problem you did...it ends up that yahoo had, in fact, installed about FOUR different programs on my machine. some of these programs had to do with yahoo! email and other things i didnt particularly know i was downloading. i went to add/remove programs and had to uninstall all 4 or 5 yahoo executables before i was satisfied everything was gone. i am still going to run ad-aware to make sure no little nasties were left behind.
if you tried to uninstall any yahoo! sofware without using add/remove programs, i suggest you find some utilites (preferably nortons) that will clean up rogue registry listings/program files.
It hadn't crossed my mind to try add/remove software. That fixed one of my issues (windows explorer). I couldn't remove the yahoo messenger explorer bar program using add/remove. I still have the Yahoo! messenger menu under tools in my Internet Explorer.
I guess I will have to find some registry fixing software.
Personalized toolbars and context menus is a feature of IE 5+. If you made your own you could add it. The only way it could 'degrade' performance is by the running of the program and the toolbars and menus don't start the program unless you click on it. It's as harmless as winzip adding the 'add to zip' menu in your context menus after installation.
Well it depends. I can easily tell you how to remove the Heading in add/remove progroms. However that won't remove the program only the fact that it still shows up in add/remove programs. You'd have to make sure the files and registry (if you care) are removed yourself.
It's not listed by plain text but it normally corresponds with how they appear in the add/remove util. At the worst just click through each till you find the one you wish to remove.
Yahoo has been getting worse ---- they were pretty bad before. If you install a yahoo program you need to go to the custom installation menu to uncheck the email, toolbar, etc features. It's not obvious. They don't neccesarily hurt performance, but they are, generally, unwanted clutter installed without permission. My son uses Yahoo Instant Messenger, and I am constantly going in and trying to turn off auto update and features that come with the updates. It has a life of its own.
Hijack This http://tomcoyote.com/hjt/ will let you easily change the registry keys that control search features that were taken over by Yahoo, plus show you other things you may not suspect are running when you start up. (but be careful what you change)