How to uninstall Spybot-S&DHow to Uninstall Spybot S&D 2.0
Both How to articles from Spybot say to uninstall from Add/Remove Programs (Programs and Features), then remove related folders afterwards. For the older version of Spybot, they say you can delete the installation folder (usually C:\Program Files\Spybot – Search & Destroy\) if Add/Remove did not help.
If the program is not listed in Add/Remove, try using a third party uninstaller like Revo Uninstaller Free or Portable
- RevoUninstaller Tutorial
If it's not listed there either, then you may want to check with Spybot S&D Support
as to why. I have not used Spybot in years but never had a problem uninstalling the older version.