Topic: Should we recommend to contact support if nothing helps?
Sometimes Teeworlds problems seem to originate from Windows®, graphics driver, router, firewall, antivirus or other complex thing and if forum members can't help (this and this for example), why not to recommend to contact support of the vendor of OS/router/graphics driver/firewall/antivirus/etc.? I'm sure they have first-class specialists that even may physically come to user's home and will solve his problem in-place.