My HP pravillion elite hpe-230f computer was getting really slow and i ended most of the processes and it was fine then the next day it got slow again and it stopped responding. i restarted the computer two times and on the second time it got stuck on the log in screen before it loaded the opptions to choose who to log into. it says welcome and it stops loading i was wondering if i re-installed windows 7 if it would fix it and if it would if it would wipe my hard drive.