The conhost.exe process fixes a fundamental Windows problem. It’s a safe process, as long as it runs from the System32 folder and it is signed by Microsoft.
The problem is regarding the viewing method of the console. It does not accept the Windows themes, at least not in Vista or XP. The scroll bar is displayed just as in the Windows Classic mode.
An improvement appears in Windows 7, where the entire console is rebuild and it accepts the default Windows theme and you can even drag and drop files over it.
Conhost.exe is part of the cmd.exe process, so this means that it is a host for command prompt. This is why you should never stop the conhost.exe process.
