ubuntu 11.10 ruined my computer

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http://ubuntuforums.org – so i had ubuntu for a long time in my laptop which uses windows 7 and today i decided to try to run on it, i ran it normally and about half-time of my internet browsing on ubuntu it shut down for no reason and the laptop did NOT overheat. so i decided i had enough of ubuntu and today i ran windows 7 and it made a disk check, so i just left it be. after the disk check it went to the TOSHIBA LEADING INNOATIVE or whatever. then after it finishes loading it goes to the TOSHIBA LEADING thing once again, etc and it never really turns on, and the only oeprating system that works now is ubuntu, seriou (Hardware)