Really weird screws

[poposojo]

So i was able to uncover my dads old desktop that he used to use as a media device. i want to remove the hdd that is in there. But the problem is that there along with the philips head screws, these circular, non allen screw looking heads that i dont know how to remove. i wanted to give the specifics of this computer, but my dad lost the password years ago, and none of the existing numbers are on the back or bottom lead to anything. the tag that says the serial code, mfg date, mfg code, name of the tower are shoddily ripped off All i can say is that this computer is a dell desktop with an intel celeron processing unit running windows 7.

[poposojo]

might have gone off-topic there, but if anyone has any knowlegde on this let me know.

[corrado33]

Those are rivets. You can't remove them unless you drill them out.

 

Take off the other side panel. 

[poposojo]

uhh ya you beat me to the punch of realizing that, didnt know they were called rivets. thx anyways.