I have a windows 2000 pro computer with service pack 2.?

my question is can i install service pack 4 and just bypass service pack 3 or do i have to install 3 then 4

I have a windows 2000 pro computer with service pack 2.?windows media

Yes you can install it just fine.

Why?

Service packs keep the product current. Service packs include updates, system administration tools, drivers, and additional components. These are conveniently bundled for easy downloading. Service packs are cumulative; each new service pack contains all the fixes that are included in previous service packs, and any new fixes. You do not have to install a previous service pack before you install the latest service pack.

I have a windows 2000 pro computer with service pack 2.?microsoft exchange internet explorer

Yes, you can just install SP4.