Your situation has become curiouser and curiouser.
What File Path is indicated for your new XP install? (for instance, is it D:\Windows ?)
To boot to the recommended Memtest ISO CD you may have to adjust your Boot sequence in BIOS to read from the Optical Drive before reading from the Hard Drive.
Yes, heat can always be an issue with any machine and especially with a Laptop, but the machines ability to Boot successfully into the parallel Windows installation would suffer the same difficulty if it were a heat related shut-down.
Any chance that you can now Boot to SAFE Mode in the original XP install?
If you can, then do the following:
Turn off the Windows Automatic Restart function, so we can see which error your system is encountering:
- Go to Start, right-click - My Computer, then Select - Properties
- Click the Advanced (tab)
- In the Startup and Recovery section, click - Settings
- In the System failure section, uncheck "Automatically restart"
- Click OK twice
Now, your system will not automatically restart when the error occurs. This does not mean the issue is resolved, it just means you will be able to see the Error Name when it is encountered.
When your machine next encounters the problem, you will see the Windows Stop Error screen, also known as the "Blue Screen of Death" (BSOD). Encountering this screen means that Windows can no longer continue operating normally and needs to be restarted. What is important is that, although daunting, this screen will tell you the Error Name and Number that made your computer unhappy. Please write down this Error Name and Number (using paper and pencil) the next time you receive it and post it back here into this same thread when you reply.
There are several Windows corruption events, such as missing or corrupt hal.dll, ntdrl, master boot record, corrupted windows.ini, etc., that can possibly be corrected with other than a repair installation.
If you can get the error message to us, we may spot a clue as to what is stopping the Boot sequence.
Presumably you do not have access to your previously installed Office and other Applications from the new parallel XP install?
_______________-
What's a four year old Laptop worth?
Well, that's really for you to decide.
My laptop is a 6+ year old Dell 8200 and it serves me quite well.
Saved Data, media and Documents, and a familiar configuration is sometimes more important than a new machine with all the new bells and whistles.
Please give us an update on the machine's current functioning and on your intentions.
Best Regards