What's the STOP error you're getting on the blue screen?

physical memory dum and few more lines with some hexadecimal error code, before i read it completely the window restarts.

it happens when the window is supposed to show the password screen where i can give my window user password.

I am not an expert but will tell you from what I vaguely remember, by having heard or read. Try to boot from a bootable CD and you can access your C:/D: on HDD.

Either its a hardware fault or a software fault. Try a repair install. If its software, there is a reasonable chance that will fix it.

For future reference, it always a good idea to keep Windows and work/data on separate partitions, that way, you can scrub clean without losing vital data.

Kaled.

Hi. Memory dumps like that are mostly always hardware (or drivers) related. If you haven't changed any drivers recently then it's probably hardware.

My recommendation would be :

1) In the startup option of Windows (right click My Computer, advanced), disabled the automatic reboot upon memory dump
2) Next time you have a blue screen, identify the DLL or SYS file in the message.

if it's always the same element that crashes then you found your problem. Google the driver name and see what is the problem.

If you see almost random DLL or SYS files in your blue screen then you have an overheating issue (90% of the time it's the reason) or a simple hardware failure. (pain in the a** but these things happen)

also, that doesn't mean the data is gone, but chances are if you can't boot at all ever again with the laptop you'll have to hook it's drive as a slave on another computer and get your data back. BUT keep in mind that the problem you are describing is NOT a HD issue or you would get the typical "NO HDD detected" or "No bootable OS found" post post-test issue.

hope that helps !

Don't do a reinstall, or any other action which requires a substantial amount of programs or data written, on a disk in a crashed computer system, if the current data on that disk is valuable to you. New disks can be bought for less than $100 in every computer store, your data may however be irreplacable.

Reinstalling is a typical Microsoft advice which places the value of their programs above the value of the data. Chances are that the OS may be starting up again after a reinstall, but with unknown secondary effects on the data side.

When a computer refuses to boot, everything can have caused the crash, including the harddisk controller, file and directory tables or parts of the disk where your Windows installation is. Reinstalling on systems with this error has a high chance of damaging otherwise recoverable data. The only sure way to recover your data (which is valuable for you according to the first post) is remove the disk from your computer and mount it as a second hard drive in another computer. In this way you will be able to bypass all possible hardware problems of your laptop, and corruption problems in your Windows XP directory. First copy the data to a safe place, think of recovering your system later.

For laptop disks, 2,5 to 3.5 conversion connectors are available to connect them to a regular larger cable.

thanks for your replied. I am online from my same crashed laptop :) in fact some registery file has been corrupted on improper shut down and it was restarting automatically. So I ran windows XP setup from CD and installed on a second partition on which I didnt have any important data. Then I selected LEAVE THE FILES INTACT while installing windows so it didnt overwrite any data even in my selected partition.

after installation i am able to access my other driver on which the window was installed previously and unfortunately i had stored my projects on the same partition. anyway, i have backed up my all projects.

only problem i have for now is that i cannot access previous installation desktop it gives access denied error. I can access all other files though including my document of the administrator.

Whilst Lammert's comments are valid, Windows performs a disk check before installation, so critical errors will normally be detected. That said, you can never be too careful if the data really is critical and not fully backed up.

Kaled.

I still think kaled's original suggestion to try a Repair Install on the affected partition was a good one. A Repair Install will replace the system files with the files on the Windows CD, but it will leave your applications and settings intact.