With a very high degree of probability, his problems are software and not hardware.
Since he has a dead-end version of windows installed, XP, my first recommendation would be to buy and install Win 7.
You should run the UpgradeAdvisor to make sure that the system is Win 7 compatible.
XP to Win 7 is not an upgrade. There is no upgrade option. You must install Win 7. The migration software from microsoft for xp to win 7 can be problematic. End result is: Backup all data dear to his heart on an external drive, clean install of Win 7, update Win 7, restore data.
Between the backup, the install, and the update, you are, as joe normal computer user, looking at 8 to 16 hours. I know some will chime in and say they did it one hour. Windows 7 Upgrade Advisor - Download - Microsoft Windows
Now with that said, let's assume you are going to stay with you good old faithful Model A.
Download, install and run CCleaner which is free (link in my sig).
After doing that, then carry out following: LIST OF STARTUP PROGRAMS USING CCLEANER CCleaner | Tools
icon | Startup
tab | click on Save to text file
button (bottom right side)
Using the PAPER CLIP
icon in the top panel of a Message Reply window, attach the .txt
file generated by CCleaner.
I strongly recommend using the least interfering and best free antivirus software available, namely, Microsoft Security Essentials (MSE). Link is in my sig. MSE is the only av that I use, install and recommend.