Remove Ubuntu 10.04 in Dual boot with Windows 7

Basic hurdles:
1. When you install Ubuntu alongside of Windows 7 then the GRUB will be over-written bu Ubuntu. So if you try to remove the Ubuntu Installation then you will lose the GRUB

errors in ubuntu while doing rake

sudo: rake: command not found


To get around with this error do the following: which is making a link to rake in /usr/local/bin


$ sudo ln -s `which rake` /usr/local/bin/


and you are done!