What to do with Two Dell dimension 8400s

Hi I recently bought a new PC leaving me with two extra dell dimensions as the title mentions. My personal dell, I consider to be the better one (well in its you it was) but for the sake of the post Ill refer to that one as Computer A and the other one will be Computer B. They're both desktops an both running windows XP. Yes I do realize the thing about Microsoft Stopping support for that OS..
So my question is..What to do with these two towers? My son has been using computer B to watch Movies an cartoons. Id like to possibly blend the best parts of these two desktops, get the rebuilt desktop online an possible OS system upgrade if the machine an handle one..
Computer A has several problems an is kinda on its last leg. I was told that the Hard drive was dying out back in December 2013. After being told that I never installed anything new or downloaded anything unnecessary to try an stretch its life. Luckily it is still alive USBs don't work, The only way I can run anything USB is through the Add-on card I installed a buncha years back. Its lets out the most horrible loud Humming noise especially when using anything big like hulu or virus scans.


System properties:
Windows XP
Home edition 2002
32-bit (SP3)


Intel(R)
Pentium (R) 4CPU 3.00Ghz
2.99 GHz, 2.00GB of RAM


Additional Notes:
298 GB space on HD
SoundMAX Integrated Digital Audio
NVIDIA GeForce 8400 GS


Computer B was given to me by my family. Its not online an my son has been using it so as far as I know the only problem we have with it is the screen being so fuzzy you cant read small text. like in the windows explorer. Its connected to a big screen TV so im guessing I probably need a better video card or possibly a better connection as I have it connected through an S-video cable at the moment. While writing this I actually tried to get to system properties and couldn't cause I couldn't see and it must be different from Computer A cause right clicking "My computer" didn't bring up the information I was looking for. Im going to connect a small monitor and see if I can find more info about this tower an report back.

 

I would take both of them to bestbuy......they will recycle them for free

 

Thanks for your inputs!
The dells would only be used for little kid games an watching Hulu an Netflix an other videos or dvds as I plan to give it to my young son.
I tried to use a DVI connection to the TV but it showed me the screen in 6 pieces...? Like on start up Id see the Dell an windows screen six times on the TV.
I refuse to pay for cable when theres nothing on anyways so we are stuck with the S-video for now I guess.
Out of curiosity though where could I find a cheap refurbished Dell with windows 7? Ive checked Craigslist in my area and I couldn't find any that didn't need money put into them to get them running.
**Im in the US.

 

newegg.com has good prices on refurb dell and hp computers all the time. Bob

 

I have purchased from this Dell site and am very pleased.

http://www.dellauction.com/

Example computer up for auction that would take carer of your needs.

http://www.dellauction.com/cgi-bin/...fnbr=40807284&prmenbr=75267554&aunbr=40807284