I am running an old laptop with Windows Vista and Tor worked fine up until the last update Jan. 25, 2018, I believe. After that the browser screen was different, all my saved bookmarks were gone, and it will no longer open any websites or close properly. The initial startup doesn't seem to have issues. I tried disabling my Bitdefender security, totally shredded and reinstalled Tor several times with the same results. Tor opens but will not work. What am I doing wrong? The update worked and caused no problems on my newer PC with Windows 10.