In Windows XP, after long history of correct wotking without problems, there is one now. After run a "Start Tor Browser.exe", a window "connecting to the Tor Network" shows up but the progress bar don`t change. Nothing is going on. After a while there is problem with this window, it changes to white without any letters. In process menager the tor.exe is present, in the firewall window tor.exe is sending and receiving packets, but the tor browser is not openning.