Did you do a manual installation or use a PlayOnLinux script?
I'm asking because I was wondering which libraries you installed...
WineHQs claims that you need:
So I'm hoping comctl32.dll is part of one of those libraries.
Not totally sure what that is, but If you set your Windows version to Windows XP and install Internet Explorer 8
Like you said, its already there, but maybe its one of Wine's libraries trying to copy a Windows library.
Another thing you can do is create an "override"
- Open PlayOnLinux
- Click configure
- Go To Wine Tab
- Click Wine Configuration
- Click Libraries Tab
- Enter: comctl32
- Click Add
There are a few options with builtin, native and disable. So you may have to trial-n-error those until it works.