My Ubuntu is gone

Ok,m We All Know how bad vista is and it went south on me and I had to reinstal it. well now there is no boot loader and I can't get to my unbuntu that was running perfect

I hope this will help you

Your boot loader has been reseted
so this may help you
http://www.ubuntugeek.com/how-to-restore-grub-boot-loader-after-installi...