Well, isn't that strange! Sorry zom but I would recommend that matt use Revo Uninstaller instead since I've never heard of or used BCUninstaller.
I've personally used Revo Uninstaller with very good results in the past with uninstalling troublesome programs. Revo can in fact find orphaned registry keys, left over folders and files too if you use the Advanced scan setting.
The free version will work great with 32bit systems but I would recommend you choose the "fully functional free trial" of the Pro version if you have a 64bit system as it better supports those platforms. https://www.revouninstaller.com/revo-uninstaller-free-download/
If you've never used Revo Uninstaller before there are some great tutorial videos (even by the developers themselves) on YouTube you can view prior to using the software.
Just to be on the safe side it's not a bad idea to create a manual "System Restore Point" first in case you accidentally delete something you shouldn't have (like a OS system file or folder).
I would recommend you enter "Safe Mode without Networking" before uninstalling with Revo Uninstaller. Some earlier versions of Win 10, Microsoft (in it's infinite wisdom) made accessing Safe Mode a more dawn out affair so let me know if you run into any difficulty there.
Also, please read the thread I added to the other Issues/Defects topic you posted regarding what to do next with the reinstall.