What OS and what versions of Poser or Daz studio are you running ? 

try to remember to create a system restore point before removing stuff, it makes recovery easier.

Check in Control Panel > installed programs for Microsoft Net Framework 1.1 , 2.0 , 3.0, 3.5  and Microsoft c++ redistributable  . If any of those are present click on them and check the right hand info. It should tell you when it was last used and how often its used. If you use the application several times a week anything indicating 'rarely' is not relevant.