I tried to use win2k cd to install it again but the pc could not boot from it. Then made 4 boot floppy disks and reinstalled win2k sever. During the coping the system files,the set up prompted me to locate the file "xxx.dll" from the Win2k CD. At the time I found the browse window can not locate at the CD rom. Therefore, I first pasted the files onto the other partiton. And restarted the set up. I rememberred I had pasted over ten dll files to be located and installed. Finally it is done and the win2k server can restart but none of programs can be used even Window Explorer. I tried to install Win2k again but the computer could not respose it at all. The details of my system is: One hard disk is partitioned into three logic drives as C(FAT16), F:(NT file system), G:(NT file system). Win Me is installed on C:, Win 2k sever is installed on F. Thanks for your attention and help!