https://community.hpe.com/t5/operating-system-microsoft/re-installing-hdd-for-dp-tower/m-p/3417519#M5415 As you can see from this link, there are a LOT of deskpro EN models.. The model number above seems to include info about the motherboard.. It is NOT the model number. find the one from the tag on your PC.. then go to this link and see if any of the articles in there help<BR /><A href="http://h18007.www1.hp.com/support/files/deskpro/us/family/16.html" target="_blank">http://h18007.www1.hp.com/support/files/deskpro/us/family/16.html</A> Tue, 09 Nov 2004 07:32:38 GMT Omar Senussi 2004-11-09T07:32:38Z https://community.hpe.com/t5/operating-system-microsoft/re-installing-hdd-for-dp-tower/m-p/3417518#M5414 A friend just gave me a DP EN 40BX-AGP - Indy that does not have a hard drive. It appears there is a tray that slides in the 3.5" HDD slot. If true, what part # would I need to buy to attach to HDD? Is there an alternative to having to buy this part (such as a large headed screw)? Thanks....Larry Mon, 08 Nov 2004 14:13:43 GMT https://community.hpe.com/t5/operating-system-microsoft/re-installing-hdd-for-dp-tower/m-p/3417518#M5414 Larry_124 2004-11-08T14:13:43Z https://community.hpe.com/t5/operating-system-microsoft/re-installing-hdd-for-dp-tower/m-p/3417519#M5415 As you can see from this link, there are a LOT of deskpro EN models.. The model number above seems to include info about the motherboard.. It is NOT the model number. find the one from the tag on your PC.. then go to this link and see if any of the articles in there help<BR /><A href="http://h18007.www1.hp.com/support/files/deskpro/us/family/16.html" target="_blank">http://h18007.www1.hp.com/support/files/deskpro/us/family/16.html</A> Tue, 09 Nov 2004 07:32:38 GMT https://community.hpe.com/t5/operating-system-microsoft/re-installing-hdd-for-dp-tower/m-p/3417519#M5415 Omar Senussi 2004-11-09T07:32:38Z