If the hard drive can't be regonized or too old to use, then the how do you run bttray exe automatically error may popups. Make sure everything about hard drive are ok then you can pass this possiblity, well, a little more, regular maintenance and good using habit will do good to increase its lifetime.Third -- Unreasonable startup or shutdown operation.
Have you ever forced a shutdown operation to your personal computer with programs running? It's quite bad thing to do, violent and malicious to computer, and yes, it will lead to how do you run bttray exe automatically error.Fourth - Baddly programmed third party applications.
Baddly programmed application is likely to be a origin of how do you run bttray exe automatically error, when users install or uninstall programes, especially uninstall some applications, some vital or important data/files may be deleted accidently. Next time, when you launch the computer or open a program, that file can't be found, then error will pop ups.