Member Avatar for agarwalp

hi......

i am facing some problem while starting XP.
my XP is automatically rebooting after i click on the link like start windows normaly., or safe mode, or start windows as in last state....etc. But after a few reboots it is then booted.
Whats the problem with my M/C?

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  • Latest Post Latest Post by jermaghs07

Dani AI

Generated

The STOP code 0x000000A5 that posted is the ACPI_BIOS_ERROR — Windows fails while initializing ACPI because the firmware and the OS’s expected Hardware Abstraction Layer (HAL) disagree. ’s step to capture the error was the right first move, and ’s note about firmware-level causes points to the general area to investigate.

Practical next steps to diagnose (collect these while the system does boot):

  • Record BIOS vendor, model and version (run msinfo32 and note “BIOS Version/Date” and baseboard entries).
  • In Device Manager, look under the “Computer” node to see which HAL Windows installed (for example “ACPI Uniprocessor PC” vs “Standard PC”).
  • Export the System event log entries from around the crash times.
  • Enable complete memory dumps in Startup and Recovery so a full dump is written if it fails again; save the dump for analysis with WinDbg or support personnel.

How to interpret and act on the findings:

  • If the HAL does not match the firmware (non‑ACPI HAL vs ACPI BIOS), a repair install of Windows XP is the usual way to let setup detect and install the correct HAL without wiping user data.
  • If firmware/BIOS behavior looks nonstandard, document the exact motherboard and BIOS revision before making any firmware changes or vendor support enquiries. Firmware fixes can help but should be done carefully and only with the correct vendor files.

Additional checks to rule out other causes:

  • Run Memtest86+ to exclude RAM corruption.
  • Boot with minimal hardware (remove extra PCI cards, unplug nonessential USB devices) in case an add‑on interferes with ACPI initialization.
    Collecting the msinfo output, HAL name, event-log excerpts and any memory dump will allow targeted fixes or vendor escalation.

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Member Avatar for 4th&3wood

Let's stop the automatic restarts first, and then the next time that it has a problem it will post an error. Please copy this error exactly and post it back here.

Start> right click on My Computer> Properties> Advanced> Startup and Recovery. Under startup and Recovery click on Settings, uncheck the box in Automatically restart under System failure.

Member Avatar for jermaghs07

i had that same thing happen to me on a customers computer and i was stumped for a while because i thought it was a software problem but it turned out that it was a bad hard drive.

Member Avatar for jermaghs07

im not saying that yours is necessarily a hardware problem but don't rule it out.

Member Avatar for agarwalp

hello........

sir i have noted the error.....

The BIOS in the system is not fully ACPI complaint....
***STOP: 0x000000A5(0x00010007,0x0000005D,0x00000000,0x00000000)

can you help me now........

Member Avatar for jermaghs07

You might try updating your BIOS.
If that doesn't work you can turn off ACPI mode during text mode setup. To do this, symply press the F7 key when you are prompted to install storage drivers. The system will not notify you that the F7 key was pressed - it will silently disable acpi and allow you to continue your instillation

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