@Ninco! I hope the Thinkcentre works out a bit better - if not, I'd just cobble together any old S775 system from eBay and stick XP on that, which I did for my main XP system a few years back.
The white cabinets are old IKEA desk legs. They had a removable shelf halfway up but they're also a perfect fit f or a desktop PC IKEA don't do them anymore, I think the closest you can get is a "table leg" cabinet thing with a door on that that you could just leave aside, although they're more expensive than my shelf things were.
https://www.ikea.com/gb/en/products/desks/table-tops-legs/alex-storage-unit-white-art-60192826/
The white cabinets are old IKEA desk legs. They had a removable shelf halfway up but they're also a perfect fit f or a desktop PC IKEA don't do them anymore, I think the closest you can get is a "table leg" cabinet thing with a door on that that you could just leave aside, although they're more expensive than my shelf things were.
https://www.ikea.com/gb/en/products/desks/table-tops-legs/alex-storage-unit-white-art-60192826/