I used to have a computer with a 500mhz k6 processor with 192mb ram back in 2003. It worked fine right up untill last november then just got really slow then we just stopped using it.
So ya just take that computer and add more ram. open it up and see how many free ram slots you have then get a 256mb ram stick for each free slot and you should be fine. You should be able to get 768mb total in that computer.
AMD Phenom II x6 1045T @ 2.7 Ghz
8GB Corsair Vengeance Ram
Crucial M500 240GB SSD (boot drive)
500GB WD 5000AAKX-001CA0
1.5 TB Seagate ST1500DM003
Zotac Geforce GTX 950 2GB GDDR5
Windows 10 Pro 64 bit