The last word I saw posted on these forums some time ago about Chrome and immunization were that there is no mechanism to immunize it.There was a mention that it is possible it could be immunized via plug-in at a later date in a different,later Spybot version,though what I was reading was from quite awhile back,so I'm unsure if that still stands.
No,Spybot doesn't have it's own separate uninstaller to use that I'm aware of.
There is an option to uninstall Spybot 1.6.2 located in your start menu.You could try that.It may not work where it isn't appearing in your control panel to uninstall,but it's worth a try.
Otherwise,please see here on how to remove it manually:
http://www.safer-networking.org/faq/how-to-uninstall/
On a side note,if you don't see the Spybot folder in Program Files,and you have Windows 7 or 8,usually those version of windows are 64-bit so you may find the Spybot folder in C:\Program Files(x86),instead.
Since you also uninstalled Spybot 2 you can look and see if there is a Spybot - Search & Destroy 2 folder as well and remove it too,if you prefer.
Or,if your Spybot-Search&Destroy folder is located at C:\ instead of C:\Program Files,you can remove it from there,just adjust the path accordingly.
(Also,if you used Teatimer,you might want to rightclick the icon down beside your clock and close it before attempting to uninstall or removing anything,just so things go smoothly.)
There's a newer version of Spybot 2 now,Spybot 2.2,you could give that a try sometime if you'd like.
http://www.safer-networking.org/dl/
If you did decide to give the newer Spybot a try and you still had problems updating then you could have a look at this page and see if it applies:
http://www.safer-networking.org/faq/...e-info-file-2/
Or Spybot 1.6.2 is also available at the bottom of the download page,if you would prefer to give that one another try,instead of Spybot 2.2.