QTCF.dll missing?

when i start gmod, i get this error:

it comes up twice, then gmod starts? any way to fix it?

Thanks,

Verify your game cache in Steam.

Afraid that didnt fix it…

Looked on a website, try checking Program Files (x86)\Quicktime\QTSystem and copy the QTCF.dll from there and put it into SysWow64 in the windows Folder.
If you have a 32-bit Windows, check Program Files instead, and copy it into SysWow32