Will using a hdd with win 7 work on my new system??

Hey building a new system and dont want to pay for a new windows 7. So i have it storded on my old system so i was wondering if i can use that hdd on my new rig and it will still work ?? :) thanks, joe
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  1. Best answer
    Negative, ghost rider. You cannot simply switch a hard drive to a different computer and expect they OS to run the same. However, and depending on whether or not you have an OEM or retail key, you can use software such as ProduKey to get your Windows key off of the old HDD, install a downloaded Windows 7 ISO onto a bootable drive, and then use the aforementioned key to activate Windows. This should work for you. The reason you cannot switch hard drives is because each system uses unique drivers specifically tailored to the hardware.

    You can find the .iso here:

    and use an imaging software such as ImgBurn to put it on a USB. There are myriad forums dedicated to this, if you happen to run into trouble.
  2. For multiple reasons, probably not.

    1. What license is the existing Windows 7? OEM or Retail? If OEM, then it is licensed to the original motherboard. At best, you'd have to call Microsoft and maybe, possibly, they would authorize that license on a new PC. But they are under no obligation to do so.

    2. New system = new install. That Windows install that exists on the old drive probably wouldn't even start on the new system.

    Sell the old PC, and use the funds to buy the new Windows license for the new PC.
    The OS is just as much a part of the PC as is the RAM/GPU/CPU/whatever.
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