How to install window xp on dell optiplex gx280

SOURCE: Unmountable boot volume or do I need another hard drive ?

Start machine press F8 repeatedly
If it lets you into Safe Mode then go to Programs, Accesories, System Tools, System Restore and try to roll the machine back a week or so
If that does not work you need to find a buddy with a copy of the software and reinstall providing your machine has the Windows sticker on the back or sides giving you the key code

SOURCE: hi,i have a dell optiplex gx280 desktop.the hard

try to hard reset the bios, do this by removing the battery on the motherboard, but be sure to remove the CPU from power outlet....

SOURCE: No Display in dell optiplex gx280 & Fan speed is veyy high

GM from pakistan fsd problem in motherboard chepset......you should repare u r gx 280 or heat the chepset with heat gun ........ 

SOURCE: Dell gx280 Optiplex - How do you get the total

you can check the manuals from this link http://support.dell.com/support/edocs/systems/opgx280/en/ug/index.htm

just select what kind of tower you have,

SOURCE: graphic drivers for dell optiplex

Use the xp ones.