I'm about finished upgrading an old but like new Inspiron 530 for a granddaughter, Have added some memory and taken it from Vista to Win 10 with no problem. Thanks to some help from this board on the bios I finally convinced the bios that the computer doesn't have 3.5 floppy. It now starts up and operates smoothly. The last thing I'm going to do is put in a new cmos battery. The 530 instructions say to record all the info on setup screens when you start. I reolaced a battery on another computer a few years back and didn't record anything. All went well and it operated normally. Could an expert tell me the best way to replace this battery, as it lost a little time the last couple of days when it was uplugged.. I don't want to screw anything up since its working smoothly now. I have a new, correct, Energizer lithium batt for it. Thanks!