Lets see..you're a highly educated person with a PHD.....
You'll need an expert.
See, it's really really complex.
Step 0 - turn off the PC and unplug the PC. Yes, unplug it.
Step 1 - open the case. This will usually involve removing 2-5 screws of some kind. Under no circumstances should you call an engineer. They will be there all week.
Step 2 - locate the battery. This will usually be a small round and flat disc somewhere on the mother board.
step 3 - GROUND YOURSELF! touch part of the mtal case -before- touching the pc guts.
Step 4 - Carefully remove the old battery by prying it up with a small screw driver. You shouldn't have to force it.
Step 5 - Drive down to the local battery store or Radio Shack and ask the pimple faced person behind the counterfor a replacement. Do not mix them up!
Step 6 - Ground yourself again before attempting insertion. If you can feel the zap, it's enough to fry your system.
Step 7 - insert new battery, close up the patient and power it on. Set your clock. It shoud now stay setted.
If that's too hard, find a local pc shop, call themand ask how much to swap in a new battery. It's a 10 minute job for most desktops.
Bob, being an engineer I relate to your comments.
Step 1 - verify the issue with friends. Step 0 was recognizing there was ana issue.
Step 2 - decide upon either the coolest approach or the most expensive depending upon what your ultimate goal is. I like cool over cost.
Step 3 - Gather the tools. One has to have the best tools to do the job.
Step 3A - Price shop on the internet for an antistatic matt and wrist grounding attachement. As well as canned air and other unique tools required for such a job. (* this could take upwards of 6 months, as one has to talk to friends and post about it and compare prices and possible buy multiple tool sets and try them out first. *)
Step 3B - Do not forget to buy the spare part or one will look really bad at step 8.
Step 4 - clean house or room or table for using all the special tools. Of course this is easier if single, but for some reason engineers do get married, and they have to worry about the spouse and their stuff as well.
Step 5 - gather all the instructions people have given to you and make sure all the tools are in place.
Step 6 - gather the computer. It would be too easy to just do it where it is - see step 4 - move it to location with all the cool tools and instructions.
Step 7 - begin to take apart the computer.
Step 8 - Spouse asks why you are doing this?
Step 9 - You spend 2 hours explaining the process you went through to get all the tools and instructions and best ideas and back up ideas and now you are going to fix it.
Step 10 - Spouse hangs head while shaking it and tries not to cry.
Step 11 - Engineer looks at spouse and wonders what is wrong.
Step 12 - Spouse states they fixed the problem already 6 or 7 months ago.
Step 12 A - Either themselves through frustration
Step 12 B - or via a neighborhood kid as recommended above
Step 13 - put computer back together and pout that you never get to hafve any fun.
Step 14 - take spouse out to eat to apologize for not listening to them months ago.
Note: An applied Engineer might just do it and use their belt knife to remove the screws and it might take 10 to fifteen minutes.
Thanks, dude! I'm married to an engineer--this should be doable!
Only if she is an applied engineer or a Mom or both.

:lol:
Ok, in the case of a PHD and an engineer....I recommend contacting eighbors who may have small children.
About the age of 10 to 12 will have just enough knowledge and still be willing to help you make the change.
Good Luck