When I start windows 7 laptop, it freezes at windows 7 logo. I have tried so many methods but I am not able to bypass this screen. To solve this issue,I tried to reinstall windows 7 but when I boot it using windows 7 DVD, it hangs on screen which asks you to select a partition to install windows 7. After that it shows an error message "System32/bcd...n" chkdsk utility. Please tell me whether is it possible to run CHKDSK utility during boot up in windows 7 or not? If yes then how and If not then what is the procedure to solve this kind of problem?