Help me for a prank - Serious geekage needed.

Windows 7 Ult

I want to fake the system information you get on the properties menu of my computer.

My brother doesn't stop bragging about how cool his computer is so I want to tell him i took it apart and stole his goodies leaving him with outdated parts.

His not knowledgeable to understand the stuff i write there isn't possible due to hardware incompatibilities. But its enough to create some epic drama in the family. Especially when he goes to tech support and insists on them checking how i did it without breaking the warranty seal

Then i hope there is a way to fake space on hard disk overviews in explorer.

If anybody knows a way to also fake entries on the device manager that would be awesome.

Obviously the computer doesn't lose any performance so no harm done