Do you have to reformat your hard drive when installing a new motherboard?

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Usually you do not have to wipe the hard drive. Most operating systems will let you boot up from a hard drive regardless of which computer/mother board it's running with.
However, I have heard that Windows XP will not allow the operating system to boot up if you move the hard drive to a new computer. I guess when you register it with the license key, the OS records information about the hardware as well. If that hardware changes, then XP fails to boot. This is only something I've heard about, and I've actually tried to move an XP hard drive to a new PC and it did not boot up - but personally - I'm not aware if this is an XP issue or another hardware problem that I was experiencing at the time.  

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It is always best to format a drive when installing a new motherboard, especially if the new board has a different chip set than the original; VIA, INTEL, AMD, NFORCE ...
Win XP is especially testy of all the operating systems. If the ide controller is different than the original it will blue screen at first boot and is hard to get past. Only with a repair reinstall can you pass it.
One other problem with swapping motherboards is integrated sound. If you have integrated sound on both the original and the new board I could almost promise you that you will not get it to work with the new board.
Last but not least, I can not explain the difference you will see between a reconfigure and a reinstall, if you do choose to reinstall you will benefit for better stability and a faster computer.  

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It is not as if with Win XP only that you have to reinstall the OS and all other softwares on the hard drive if you change the motherboard. But the same thing happens with windows 2k too. While changing the MBD of one COmpaw Enl PC I Encountered the same problem. May be that happens with other Os (Read Microsoft) also. A little Bit of experimentation with other Os will let you know if at all that happens.  

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No, you do not have to reformat. But if the motherboard is of a different type, your drivers will be no good. You will have to change back to the defaut Microsoft drivers and then install your new MB drivers. GO to Google and type "Merge Winxp" and you will find the procedure laid out for you.  

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They're correct concerning the responses with WinXP. When Windows XP was introduced, so was "Windows Product Activation". When you first register Windows XP your Product ID Key is sent to Microsoft via your internet connection. and Windows XP takes a snapshot of your hardware, including the type motherboard you have. The Product ID Key used in setting up Windows and your hardware information is also saved in a file on your hard drive named "wpa.dbl". Every time you start Windows it checks this file and compares it to your current hardware, and if you alter the hardware, the information contained in your "wpa.dbl" file will not match the configuration of the computer and Windows won't boot.
Windows 98 or earlier ? That's easy !! - boot Windows in Safe Mode The problem will be that the drivers installed in the OS will not match what's on the motherboard. What you need to do is remove all of the drivers in Windows RIGHT BEFORE you replace the MoBo. Make sure you have the disks for you Motherboard, video card and any other peripherals if necessary.
First, back up all of your data. Then do this: 1. Right-click on My Computer. Select Properties. 2. Click on the Device Manager tab. 3. Remove ALL of the devices in the Window.
After you have done this, shut down your machine, install the new Mobo in your computer. Have all of your driver disks ready. When you start up, Windows' Plug and Play feature will look for the drivers for your new (and old) hardware. This is where you'll need the disks to reinstall the drivers.  

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Hi All, I am not sure about how it works in WIn98 or WIn 95. MS operating systems that were released after that has a component call Hardware access layer. It stores the information on the kind of hardware being used. When you change the motherboard then the HAL information that is available with OS like, WIn2k, XP or say win2k3 mismatches. Hence the OS doesn't boot. But don't panic, no need to backup data, no need to do lot of running around. After you change the mother board, just boot your system with the Win xp CD. Let the setup run as usual and then instead of new installation select Repair option. It will delete all the OS files (Note:only OS files, No data is lost) and then it reinstall the OS with the new HAL information. Now after the installation finishes your system is ready for use. Here I would like to follow a good documentation on how to run repair on win xp of win2k. If you do it properly, it will reduce your task by half. Enjoy!!

First answer by ID0412586279. Last edit by Mohdnazerkhan. Contributor trust: 0 [recommend contributorrecommended]. Question popularity: 262 [recommend question].