How to Fix MBR in Windows 7 (Operating System not found)

MBR in Windows 7 is the “master boot record (MBR), or partition sector, is the 512-byte boot sector that is the first sector (“LBA/absolute sector 0″) of a partitioned data storage device such as a hard disk”. The issue with such a partition is that it may become corrupted thus preventing you from booting up your computer. The most common error such a corrupted MBR returns is“Operating System not found”. Let’s see how to fix it with this quick tutorial. If this trick doesn’t work for you read this other tutorial of mine: Fix MBR.

1. Insert your Windows 7 DVD to your CD/DVD drive and reboot your computer.
2. The following message should appear on your screen: “Press any key to boot from CD”.
3. After pressing a key ( I usually press Enter) you should face a screen asking you to select your language, time and keyboard etc.
4. On the following scree you should see a link like this: “Repair Your Computer”. Click it.
5. At this point, Windows Recovery Option will start searching for Windows 7 installation files on your computer.
6. Once it finds all it needs, a small window will warn you to choose the operating system it found.
7. Select your operating system and press the Next button.
8. A new Windows Recovery Options window will appear on your screen. Select Command Prompt which should be the last option of the list.
9. On the Command Prompt, type bootrec.exe /fixmbr and press Enter.
10. Done!