This question already has an answer here:
Hi guys I installed ubuntu 12.04 (x32) on my system and then side by side I had my windows7 ultimate(x64) running aswell (dual boot).
Last week for some reason I started getting a blue screen crash after running an update on ubuntu. Blue screen said it has a crash with code bCC:0000145, I didnt know what to make of it hence I thought just erase the whole HDD and start over with a fresh copy of windows. And this where (I feel a major disaster struck, as i'm a noob i've no clue what i did was WRONG!!!) I got into a huge problem, when I put in the Windows OEM cd and set the comp to boot from cd it was going all fine untill I deleted all my partitions into unallocated space and then wanted to make new partions and start fresh - BAMM another blue screen of death.
And this time after the blue screen it's stopped booting from Cd, and directly gave me an error message saying "no such partition; grub rescue" I've tried everything in my capacity to get it to work but I dont know clearly what to do further please help.