1. I use a hard disk test program from the machine or the hard disk maker.
2. I run MEMTEST86 (see google.com)
3. I'll install Linux to see if that coughs up a clue about what's amiss.
In closing this could be an old laptop HEAT issue. Are the heatsinks and vents clean?
Bob
I have a dell inspiron 1000, and I am trying to format and install a fresh copy of windows XP home edition.
Using the cd, the complete format of the partition will not work it just sits at 0%, I have waited for it to move for upto 3 hours, I have installed windows xp on my two pcs and niether took that long to work.
The quick format works and then it installs the setup files and reboots. However after rebooting it goes to the windows screen, then the setup screen and then to a blue error screen.
which says...
"Stop: c000021a {Fatal System Error}
The Session manager initialization system process
terminated unexpectedly with a status of
0xc000026c (0x00000000 0x00000000).
The system has been shut down."
I have tried several times to completely format the laptop, but it just don't work and everytime I use the quick format it does the same thing that I described earlier.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic