trying to log in to Playroom and theres a combobox for server and clicking connect does nothing. i've installed the most recent version from the website.

Ensure that there is an item "QuentinC's playroom" or "QuentinC's gameroom" in the combo box. IF not, uninstall completely the client by passing through control panel before reinstalling it again.

You can also try simply to delete the config.ini file in the game folder.

i've uninstalled, deleted all items, reinstalled. i still have a server combobox with 0 items

Try to delete config.ini then

where can that be found? i do not see it in the programfiles\qc-playroom dir

It should be created the first time you start the program.

If still not, check authorizations, or try to install the playroom in a different folder. Some people already reported problems when installing in default directory, and solved successfully by installing elsewhere outside of program files, in a directory without any special characters or spaces in its name.