windows 7 on pentium d

i wouldn't go any higher than XP on that machine. if you upgraded the ram to 4gig you could run it, but it wouldn't be a pleasant experience.

If you want to run Windows 7 on your PC, here's what it takes:

1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor

1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)

16 GB available hard disk space (32-bit) or 20 GB (64-bit)

DirectX 9 graphics device with WDDM 1.0 or higher driver

You would be able to install and run it. But do not expect the best performance.

Yes, but it won't run well. I would recommend a minimum of 2 GB of RAM and 4 GB if possible. You probably won't be able to run Windows Aero Glass either (the pretty GUI Interface). Honestly though, with hardware that old I'd stick with Windows XP if possible. It uses a lot less resources compared to Vista/7/8.

Another thought since I assume you're not gaming on this computer. If you're just trying to get away from the older Windows XP you should consider Linux. Unbuntu or Mint are two good examples. They require far less resources then Windows Vista/7/8 to do similar things.

Yea think you will be fine. I had windows 7 running on a laptop with an old pentium dual core. i think it was one generation newer than the one you have, but its a laptop

Thanks, would it run better with 2 gb ram?
I have Linux Mint on dual boot , but i want to run lightroom 4

better, yes, but still not very well. what is your need for windows 7? spending $100 on a windows license isn't the best investment in that machine.

woops read wrong

If you really wanted it to run smoother, adding more RAM would help, and maybe a low lvl graphics cards just to replace the terrible integrated ones, like a 8400 gs or somthing its like 30 dollars.

lightroom 4 requires 2 gig of ram, so off the bat you would need a ram upgrade.

thanks everyone for the fast replies i joined tomshardware just 5 miutes ago. im gona try it with 2 gigs of ram

best of luck!

Your welcome, and good luck!

Would a 32 gb ssd for c drive make significant increase in performance?

I dont even know if windows 7 with all the updates would fit on a 32g ssd, i think once i did a fresh install and installed updates, i was around there.

id get a 64 gb on.