my laptop won't start up

Yaaa

Estimable
Dec 24, 2014
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my laptop windows 7 won't start up it blink an error message in blue screen fast enough where it's difficult to read and start up repair won't fix it and also it won't restore to a previous restore point, i know my hard drive is not failing because i use Ubuntu and i can do anything with it. how can i fix my windows 7 with out loosing any data?