i am using os x mountain lion on my macbook air 13 inch. i needed corel draw x5 bt it isnt available on mac version. so i had no choice. i recently downloaded windows 7 home premium. it went all good. i finished installing windows 7 using bootcamp on my mac. but whenever i am launching windows 7 the home screen comes... everything is woking fine but suddenly it gets stuck and nothing works. then i have to reboot and work. every time i launch windows 7 after like 1 min it freezes.... i am tired of this ****. dont know what to do.. is anyone there who can help me solve this out?????