Windows 2000 copy

Oh! where, oh! where can my original Windows 2000 be?

I have the key etc but cannot locate the Windows 2000 disc (disk).

I can downloas SP4 but I never changed from the original - please do not tease me - I know that I should have done this!

Anyway, my grand-daughter reported that there was a Blue Screen and true enough there was.

I lucky enough had the 4 Start-Up discs but I have no option but to try to repair my Windows 2000 rather than do a new installation and here is the root (no pun intended) to my problem - No disc!

Where can I download a basic Windows 2000? - has anybody any idea?

Regards and thanks