Yes, an old HDD can work with a new build if properly configured and updated.
Yes, an old HDD can work with a new build if properly configured and updated.
By this Saturday I would have finished my purchases for the new build. I have a query. Right now I’m running an older HP machine with an i5 650. It has an MSI MS-7613 (IONA-GL8E) motherboard and Windows 7 preinstalled, which I can wipe clean to fresh Windows 7 using the HP hardware without needing a CD or key on my HDD. I’ve already acquired an Asus Z87 Plus with the 4670K, and I plan to reuse its GPU, RAM, and PSU from my recently upgraded old build. Can the new build start Windows 7 from the HDD I’ll be using again? I don’t want to spend extra on a new drive or OS just yet.
You may agree but if you don’t fully eliminate all drivers they could create problems. Regarding Windows activation, if it turns off simply apply the OEM key found on the back of your machine; you might even upgrade to a fresh OS and verify the same version code. It’s often simpler to start with a new OS, though the OEM key works as long as you haven’t used it previously.
Some factories automatically install drivers during setup. A tool named ProduKey could be useful, as it retrieves keys for software on your computer if you need to reinstall them. I’m not aware of any genuine program that deletes drivers on its own—you might just need to open the device manager and remove them manually.
I would remove those first, focusing only on the graphics card, chipset and similar components. By default, Windows will adjust the processor and other settings, but drivers aren't really necessary. Just buy it if it's the same Windows version—Home Premium—then the OEM key should work. You need a stable internet connection to activate, and I wouldn't suggest doing it without one either.
I hope @Icuw1pc has the right idea. However, in general we would caution against it. Prebuilt solutions rely on proprietary OEM software that is typically tied to a specific motherboard. This means they aren't compatible across different systems. Generally, all OEM tools follow this approach, but manufacturers actually have ways to track usage of those proprietary keys. Another point: although you can run fresh Windows on another machine, avoid using restore CDs. They will automatically install drivers and bloatware during setup. It's better to perform such installations with a standard installer that doesn't add extra drivers.