Remotely control computers?

i was hoping to control computers remotely. I was hoping to run a setup where the computers are on one floor, and i would control them from 2 floors up. the problem is, some of them are running Linux, and the others are running various versions of Windows (98, 2000, XP). So i dont think i can use a software program. also, i think the distance it too great to use a KVM switch (because of the VGA), so is there any way to accomplish this?

Remotely control computers?anti virus protection

Do you mean remote control or remote session?

For Windows Remote control

Install logmein - just use free version

https://secure.logmein.com/products/free...

Then use your browser for the client - The client and server need WAN access.

Linux, Remote Session Try VNC server

http://www.tightvnc.com/download.html

install server on tux box

the clients also need VNCviewer included in the install.

Remotely control computers?antivirus

Pretty sure you can still ssh and use putty on Windows. Haven't used VMWare before, but I heard it works. Usually I only ssh between *nix boxes so I'm not sure with Windows but I know you can still use putty to ssh