Fix Windows 7 Master Boot Record [MBR] after installing Linux

Repair MBR in Windows 7

First, insert your Windows 7 DVD into your DVD drive and restart your computer. You should get a message asking to press any key to boot from CD.

press any key to boot from cd

Note that this message will automatically come up if your boot order is set to CD/DVD drive first. If not, you will not get the message to press any key. In that case, you can read an article on how to change the boot order in the Windows BIOS.

Next, choose the Language, Time and Keyboard and then press Next. Usually, you do not have to change anything here.

fix mbr windows 7

On the next screen, you will see a link called Repair your computer at the bottom. Click on that.

windows 7 repair your computer

System Recovery Options will now search for Windows 7 installations on your computer.

search windows installations

Once it finds it, go ahead and select your operating system and choose Next.

windows 7 repair mbr

Now you will see the list of System Recovery Options, which include Startup Repair, System Restore, System Image Recovery, Windows Memory Diagnostic, and Command Prompt. In our case, we will choose Command Prompt since we have to run a command to fix the MBR.

windows 7 system recovery options

At the command prompt, simply type in bootrec.exe /fixmbr and press Enter.

fixmbr windows 7

That’s it! Restart your computer and hopefully you will see the Windows logo instead of that horrible “Operating system not found” error message or no windows 7 at all.

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Determine IP Address From a MAC Address

There are a couple of ways you can go about doing this. Firstly, it’s important to understand that the MAC address might not be the address for a PC. It could also be the MAC address for a printer or some other type of device on the network.

If you suspect the MAC address is a printer, first check out this site below to see if it matches a major manufacturer:


You can also find out if the MAC address is from a switch or other networking device from HP, CISCO, etc. If you’re sure the MAC address is a computer, then try the methods below to determine the IP address.

Method 1 – DHCP Server

The simplest way to get an IP address from a MAC address is to check out the DHCP server, if possible. Whether you are in a corporate environment or at home, each computer is being assigned an IP address from a DHCP server (unless it’s a static network, which is rare).

You can either go into the DHCP console on Windows Server 2003/2008 or you can log into your wireless router at home, if that is what you are using.

find ip address

Simply go to Address Leases under the Scope and you can view both the client IP address and the Unique ID, which is the MAC address.

If you have a wireless router at home, it will vary depending on the brand (Belkin, Netgear, LinkSys, etc). But basically, there should be a section to view all the current devices connected to the wireless network.

On my AT&T U-Verse box, it’s right on the home page and I simply click on Device Details to view the MAC Address.

get ip address from mac

Method 2 – Ping Broadcast Address

The second way to do this if you can’t get access to your DHCP server is to use a useful command in Windows called ARP (Address Resolution Protocol).

Basically, you ping the broadcast address on your network from any Windows machine and then check out the ARP table afterwards.

If you subnet is 192.168.1.X with a mask of, then you would ping When you ping, you will get a Request Timed Out all four times, but don’t worry.

ping mac address

Next, type in the following command

arp –a

You will now get a list of all the connected devices on your network along with their physical addresses! Pretty nifty trick.

arp -a

Method 3 – Free Tools

Lastly, you can use a free program to get a IP address from a MAC address. It’s called CC Get MAC Address and it can be downloaded here:


Before you can use it, however, you need to scan all the IP addresses in your subnet in order for it to work. The program itself has a auto scan feature that takes in a IP range.

You can also use a free program called Advanced IP Scanner, which will do the same thing and is a program totally dedicated to scanning IP addresses:


You can also use the IP Scanner and then simply run the arp –a command to get a list of IP/MAC Addresses.

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Relief Effort in Pakistan via Mike Shinoda's Blog

I need to take a quick break from LP/ATS press / promo to give you guys a heads-up on a new Music For Relief effort.

Monsoon rains have caused the worst flooding in Pakistan in 80 years.  20 million people have been affected – more than the number of people affected by the 2004 Indian Ocean tsunami, Hurricane Katrina, and the 2010 Haiti earthquake combined.
With their homes and livestock destroyed, millions of families have had their lives turned upside down.  Displaced families are camping on roadsides.  Many lack shelter, food, and clean water.

MFR is partnering with the UN Refugee Agency to help provide shelter and life-saving aid to millions of people in need. Our goal is to reach and serve 560,000 survivors, but we need your ongoing support.

Here are two ways you can help:
Make a donation to help victims of the Pakistan Floods today. Go to www.musicforrelief.org/donate to make a contribution.  100% of your donations will help survivors in Pakistan; MFR is matching individual donations up to $10,000 for this recovery effort.

Or support MFR’s Pakistan Flood Relief on Socialvibe.com.  Go to http://www.socialvibe.com/musicforrelief and complete the activities.  Even if you are unable to make a financial donation, you can help those affected by the Floods on Socialvibe.com.

Once you’ve taken action, please share your support of MFR for the Pakistan Floods on Facebook, Twitter or forward this email to friends and family and ask them to do the same.

(image credit: AP)


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