Meh, been playing around Linux for 14 years and my first distro was Slackware. If you are new to Linux, please understand /var/log which will tell you a lot of things. Then understand Google Search, it really does answer a lot of questions.
/var/log - Your LOG files which you can view by any text editor or using tail command.
terminal - Use it when programs fails. It may display errors or check if you can set debug or save log file somewhere. Also see if the program has a log file location.
updatedb - This updates your search database which index locations.
locate - This locates files throughout linux, ensure you updatedb.
blank screen - Ensure your Xorg Config is setup. Drop to TTY by pressing Ctrl+Alt+F1 then type "sudo Xorg -configure" then "sudo cp /home/username/xorg.conf.new /etc/X11/xorg.conf" after that type "startx" You are most likely getting the "Screen(s) found, but none have a usable configuration." error...