[Black10101]

Small problem...everytime I try to open DOS from the Start/Run menu with ANY type of command I get a DOS screen that flashes up for about two seconds then just disappears and is gone I can't seem to work out what is going on...any help would be appreciated....

[jm100dm]

Is another window popping over top of it or is it completely closing? If there is a button for it in the task bar you can click on it to bring it back on top.
If not can you access it from start\programs?

[Rockn]

Are you running system commands from run or does something like calc do the same thing?

[JayTheHun]

Assuming you're running a pre-Windows 2000 Operating System, goto Start-Run, type "command" (without the quotes), then run your DOS command. If running Windows 2000 or later, Start-Run, "cmd" then your command.