1) From Microsoft, right now: (exchange for 32-bit)
http://www.microsoft.com/windowsxp/6...e/default.mspx
Drawbacks -
1) Your old 32-bit license will be invalid if you choose to upgrade for free.
2) Download the trial version then buy (or exchange 32-bit for) the full version later:
http://www.microsoft.com/windowsxp/6...ion/trial.mspx
Drawbacks -
2) You have to install twice.
3) Buy it from a shop:
http://froogle.google.co.uk/froogle?..._s&sa=N&tab=wf
Drawbacks -
3) You have to pay around £100 for it, and also purchase hardware (like a hard disk) at the same time.