yes, you see the PrtSc SysRq key on your keyboard? usually above the enter key and such, you see Del, Ins, Pause Break, etc, there should be PrtSc
click on that button, open paint, ctrl+v, crop the pic if you want to, save it to the desktop, open imgur.com, in "upload image" click there, upload from your computer, select your picture. wait for it to upload and them post the link here like this [ img ]link [/ img] without spaces
easier way is getting prnt.sc and you can just press prtsc, select the zone you want to upload, and done