Windows CE Update?

[Jack!]

Can I update Windows CD, to Windows 7?

I want to upgrade one of these:

http://www.ebay.co.uk/itm/HP-COMPAQ-T5000-THIN-CLIENT-USED-/270737432938?pt=UK_Computing_DesktopPCs&hash=item3f0935616a#ht_515wt_905

[Homosexual]

No, because it doesn't meet W7 requirements:
http://windows.microsoft.com/en-GB/windows7/products/system-requirements

[Recursion]

No, Windows CE is an embedded platform, if you could find a way to flash Windows 7 embedded then possibly, but I doubt you'll be able to. Anyway, that Compaq is meant to be a thin client machine to a server infrastructure, not for use as a normal computer.