I searched all over the Internet but there are no solution to my problem, whatever I add, grub menu doesn't show up, I did a grub update but it doesn't detect windows, I don't know what to do, I have to log on Windows 7.
IF you have ur windows 7 DVD, boot into recovery and open command prompt
now reboot and insert ur ubuntu live cd and in terminal type
this should fix it
for more info on the bootrec tol visit http://support.microsoft.com/kb/927392
Unetbootin isn't very user-friendly. I'd suggest Linux Live USB creator, which I think is linuxlive.org.