Sunset
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
This is a home computer I bought back around '07, with pre-installed Vista Home Premium. The only piece of MS software I bought for it was Office, only because they offered large academic discounts. It has Access, but says I to Access, "shoo, fly!".
You could download Ubuntu and burn it to cd/dvd and try running it on your old machine from the cd/dvd as a quick test.
If you stuck in a new drive, unplug the windows drive, and you could install Ubuntu on that machine on the new drive.
If you are really comfortable with computers you can of course set it up to dual boot.