I'm using Firefox 35 but, when WindowsBlinds and several themes were installed on Windows 7, Firefox is not working anymore. It does not start and a message box appears saying that Firefox is locked.
When WindowBlinds is uninstalled, Firefox works well again.
Please, what should I do to fix this problem?
Thank you very much for everyone who sent me solutions!
(I'm sorry for my bad English, I'm still learning English)