Strange boot problem

Hello to all,
I am having a strange problem with booting up Windows.

The problem starts like this -

I had Windows 7 running on the PC, after a few months it constantly gave me BSODs saying BAD POOL CALLER and IRQL NOT LESS OR EQUAL. This wont allow my computer to start, so I reinstalled Windows 7 again.

Now whenever I restart Windows 7 it won't, It just stucks when booting (the balls joining together and forming Windows logo), now the MOST STRANGE thing is that after keeping the computer off for about 10 minutes Windows 7 starts correctly without any interruption like it's magic.

I tried installing XP to overcome this problem but the same thing happens, it stucks on boot. One more thing is that in this situation I am unable to boot from CD too, until I wait for 10-15 minutes and start the computer again.

Windows 7 in safe mode also stucks on : CLASSPNP.SYS
Windows XP in safe mode stucks on : MUP.SYS

Also note that I have not completely formatted both my drives as they contain lots of data and I dont have any backup media, If it becomes necessary to format pls let me know.

Additionally in this case where I can boot from no where, the HDD light also doesn't blinks.

Pls help me solve this problem.

debdutta said:

Hello to all,
I am having a strange problem with booting up Windows.

The problem starts like this -

I had Windows 7 running on the PC, after a few months it constantly gave me BSODs saying BAD POOL CALLER and IRQL NOT LESS OR EQUAL. This wont allow my computer to start, so I reinstalled Windows 7 again.

Now whenever I restart Windows 7 it won't, It just stucks when booting (the balls joining together and forming Windows logo), now the MOST STRANGE thing is that after keeping the computer off for about 10 minutes Windows 7 starts correctly without any interruption like it's magic.

I tried installing XP to overcome this problem but the same thing happens, it stucks on boot. One more thing is that in this situation I am unable to boot from CD too, until I wait for 10-15 minutes and start the computer again.

Windows 7 in safe mode also stucks on : CLASSPNP.SYS
Windows XP in safe mode stucks on : MUP.SYS

Also note that I have not completely formatted both my drives as they contain lots of data and I dont have any backup media, If it becomes necessary to format pls let me know.

Additionally in this case where I can boot from no where, the HDD light also doesn't blinks.

Pls help me solve this problem.

Can be many things. Heat, PSU, GPU, or a driver.

Since it sticks in safe mode I suspect hardware.

Since it is BSOD'ing we need the dmp file created when the computer crashes.

If you wish to have others assist you with your computer's BSOD symptoms, upload the contents of your "\Windows\Minidump" folder. The procedure:

* Copy the contents of \Windows\Minidump to another (temporary) location somewhere on your machine.
* Zip up the copy.
* Attach the ZIP archive to your post using the "paperclip" (file attachments) button.
* Briefly describe the problem history and circumstances in the same post. Somebody will attend to your query as soon as possible.

Sorry, due to re-installation of Windows, the minidump files are gone but you can see my last threads here where I needed help related to a BSOD that was disturbing me before 3-4 days the final crash.