@jenny5  32-bit itself isn’t an issue since there are plenty of 32-bit applications still running on )4-bit systems. You’d just need 32-bit drivers are available from Dell or through Windows Update. But if those exist, then you could install a 32-bit version of the version of Windows for which driver support is available. The problem is specifically trying to run XP. I doubt you’ll find XP drivers available for 32-bit or 64-bit. Windows XP came out in 2001, so I doubt the component vendors ever bothered to create XP-compatible drivers for the hardware in that system.

This is the last generation of CPU that will support Windows 7 -- but you won't be running XP on it.

would it install xp 32 itself tho? i'm getting the acpi compliant error at the moment and i'm not sure if it's some Sata drivers issue or what.. (it's the m2 Nvme disk lol)

well, i'm getting exactly this "0x000007B" error after pressing F7, but i can't slipstream any drivers into it anyway, because it doesn't have any Xp Cab drivers on the website?:s

https://dellwindowsreinstallationguide.com/windows-xp/#error-0x000007b-and-driver-slipstream
https://www.dell.com/support/home/en-uk/product-support/product/precision-m3510-workstation/drivers

@jenny5  No it probably will not install XP 32-bit. The system hardware is far too new to be natively supported by XP, and as you’ve found, there aren’t XP-compatible drivers available for it that you can add. You can’t just try to use Windows 7/10 drivers on XP. Newer drivers often rely on newer APIs and other features built into those newer OSes. And if you have NVMe, even Windows 7 didn’t have native support for NVMe — or USB 3.0, for that matter. Both required additional drivers, and neither technology has XP drivers available.

If you need to run the ancient and completely insecure XP these days, you’ll have to do it as a VM using something like Hyper-V or VirtualBox. But even then you’ll run into the issue that XP basically can’t browse the Internet anymore since it doesn’t support any of the modern security protocols that are now required by many popular websites, nor do any major browser vendors still provide XP versions of their browsers. But that’s probably a blessing in disguise because XP stopped getting security updates years ago, and since then several major vulnerabilities have been discovered and not been patched, so chances are your XP system would get compromised if you connected it to the Internet anyway.

Bottom line: What you are attempting will not work, and it’s honestly a terrible idea anyway.

@jenny5  To add native NVMe support to Windows 7, you need to slipstream a Windows hotfix into both the boot.wim file and the install.wim file.  The much easier solution is to set your system to RAID mode rather than AHCI mode, in which case the Intel RST controller becomes active and abstracts the NVMe interface from the OS.  In that setup, you just need to load the Intel RST driver, which you don't even have to inject into the WIM.  You can just get the "F6 floppy" version of the driver from Intel, copy it to a flash drive, and then when you get to the point asking where to install Windows, click the "Load driver" button and load that driver so that Windows Setup will see your storage.  If you can't even get the Windows 7 installer to start, I'm not sure what to tell you.  But Windows 7 is almost as bad as XP at this stage.  It hasn't received security updates all year, and serious vulnerabilities have been discovered since then.  Browser support is still available for now, but that will likely stop soon.

well.. the win7 installer doesn't even seem to come up at all(only shows some broken screen), so do i need to slipstream some samsung nvme drivers into it somehow and where do i get those from? (it already has sata f6 and usb3 drivers in it)

well, the win7 installer would probably work from a Dvd device, but is it possible to get atleast win7 32bit drivers from somewhere or can Dell make them on a request? :z

@jenny5  Is Dell going to make drivers for an end-of-life operating system "on request"?  No.  In fact depending on the drivers you're hoping for, it wouldn't even be feasible, since drivers are typically written by the component vendor, not the system manufacturer.  But even if that weren't an issue, Dell isn't going to invest development and testing effort on something like this just because some customer wants it.  But I don't see why you even need Win7 32-bit rather than 64-bit.  Win7 64-bit can run 32-bit applications, and Dell actually DOES have Win7 64-bit drivers for the Precision 3510.  Or do you actually need to run an ancient 16-bit application that can only run on 32-bit OSes but not 64-bit?  And if that's the issue, why exactly would it not be feasible to run that 16-bit application in a VM?  You could install a modern OS, then use Hyper-V or VirtualBox to create a VM running Win7 32-bit or even XP, and run your 16-bit application in there.

In any case, I don't think I can add anything else to this thread.  If you're determined to try to get an OS that's no longer receiving security updates running directly on your system, then best of luck.  I personally think XP will never work.  Win7 32-bit might work if you're sufficiently determined and skilled, but it would be a worse experience than 64-bit especially if your system has 4GB of RAM or more.  If there's some reason you need to run an old 32-bit OS and a VM isn't an option, then I'd suggest buying a cheap, old laptop for that purpose.  The very low cost of such a laptop will probably be less than the value of the time you've already put into this.  And that's why I don't think I can add anything else to this thread.  I volunteer time here trying to help others, but I just don't see a realistic opportunity to do something worthwhile here, at least not beyond the suggestions I've already made.

ok, but where are the 32bit win7 drivers then, because i can't see anything like that in the drivers section

@jenny5  As you say, Dell only lists Win7 64-bit as an option, apparently because Win7 32-bit isn't officially supported on the Precision 3510, possibly because Dell didn't want to offer the Precision 3510 with an OS that could only use up to 4GB of RAM, as is the case with Win7 32-bit.  But if you're sufficiently determined to try to set this up, you might find that some of the driver packages for Win7 64-bit also include 32-bit drivers.  Dell sometimes uses the same driver package to cover both architectures of a given OS.  For example, I just went to support.dell.com for your system, selected Win7 64-bit, selected the USB 3.1 driver, and clicked "View full details".  On that page, when I expanded the Supported Operating Systems section, both Win7 32-bit and Win7 64-bit were listed.  So other drivers might be like that.  If that doesn't cover everything you need, you might be able to find Win7 32-bit drivers for certain hardware by going straight to the vendor of that component, such as getting Intel WiFi drivers directly from Intel, for example.  Or you might even find that Windows Update will provide suitable drivers to fill any remaining gaps.  If none of that pans out or you're not willing to go to that trouble, then you're probably stuck.

But just out of curiosity since I've already spent so much time on this, why are you so determined to install a 32-bit OS on this system?  And why is a VM not a workable solution?

@jenny5  Those sentences are generic.  Some DUP packages are actual applications rather than drivers, in which case they're saying that 32-bit DUPs can be installed on 64-bit Windows.  But the opposite is not true, i.e. 64-bit DUPs will not work on 32-bit Windows; they only work on 64-bit Windows.  But in the specific case of drivers, 32-bit and 64-bit are NOT interchangeable.  32-bit Windows requires 32-bit drivers, and 64-bit Windows requires 64-bit drivers; 64-bit Windows will NOT accept 32-bit drivers, even though it will run 32-bit applications.  So the question is whether the driver packages include 32-bit versions.  Quite often they do, but not always.  The generic language you're seeing won't really answer that question.  The "Compatible Operating Systems" list will likely be more helpful on that front.  Or you can just try out all the packages you need.  If you try to run a DUP that only contains 64-bit drivers on a 32-bit Windows system, it will just fail without installing any drivers; it's not going to brick the entire system.  And if you find that you need a driver where Dell is only providing a 64-bit bit version, again you can try going straight to the component vendor.  Or like I said, you can start by simply running Windows Update.  It might supply a bunch of missing drivers right off the bat, in which case you might not even need to grab very many drivers from Dell, if any at all.  I'd start by running Windows Update as many times as needed for it to say that you're up to date (sometimes that takes multiple reboots) and then opening Device Manager to see what's left.