To also answer your questions: I've installed WAMPP when UniformServer did not work, but I've removed that later. I've renamed and edited .htaccess but that's not solving the problem. I used Skype (see above), but I've closed that, even as all other programs, except my antivirus. It still does not work. Seems like there's a conflict somewhere. What to do now? Thanks a lot for your help.