Startup problem

This is a new PC with 1300MHz Duron processor, 256MB RAM, 30GB hard disk, Windows XP home. When it starts, it gives the menu
“Please select the operating system to start
1. Microsoft XP
2. Previous operating system on C
There is no previuos operating system. So we want to load Windows XP immediately. Does XP have the attribute utility to be able to read and edit the MSDOS.SYS file?. Prercisely what do we remove from the file (I realise that this could prevent the PC booting, so we must backup the file first.