Hello
I want to install windows 2000 server on a computer but on this computer was installed windows xp. I don't know to delet windows xp without format harddisk and install windows 2000 server. Plese help me

Is there a reason you do not want to format the drive?

To answer your question.
It cannot be done this way !

There are a number of reasons including;

Not possible to downgrade an OS without formating
Different was of dealing with processes
Different drivers
Etc


The only way to do this is via a format.
You're going to have lots of fun with drivers ;)

The only realistic way you could do this is to dual boot XP and 2000 server, (fraught with problems).

Why go from XP to 2000 anyway?