Member Avatar for ultrasquare

Just installed xp home. Every day my pc boots up (when powered off) and goes to login page (this occurs at the same time daily). I have disabled all bios start up features. It appears that its trying to send an at command? this does not happen when i use my old 98 drive. Auto updates is desabledand some tasks (messenger, remote registry...)
I have the latest service pack and all updates installed to date.

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A few clarifying points and a compact troubleshooting flow based on the thread: a fully powered-off PC cannot be woken by software running from the hard drive. As noted, only a hardware/firmware-level signal will power a machine from the OFF state (RTC alarm, modem ring, NIC wake, or AC-power recovery). The “AT” entries seen in Event Viewer are Hayes-style modem commands and are a useful clue, but they are modem activity records rather than proof that Windows itself initiated a power-on.

Steps that helped in this case and are useful for similar diagnostics:

  1. Correlate Event Viewer timestamps with the observed power-on time to identify what fired just before the boot.
  2. Inspect BIOS/UEFI Power Management options for entries named like “Resume by Alarm”, “Power on by RTC/Alarm”, “Wake on Ring”, “Wake on LAN”, or “Restore on AC Power Loss”.
  3. Clear CMOS (jumper or remove the coin cell briefly, discharge capacitors), then load and save BIOS defaults — doing this after a BIOS flash is important because stale NVRAM can leave hidden wake flags set. (@caperjack’s advice about saving defaults after a flash is consistent with this.)
  4. Temporarily disconnect external modems and phone lines, and disable NIC wake features in both BIOS and device properties to rule out peripheral wake sources.
  5. If the fault reappears despite defaults, consider reflashing with the official vendor image, verify BIOS version/date, and check the CMOS battery health.

The resolution reported by — resetting BIOS defaults after a corrupted flash — matches common firmware/NVRAM corruption symptoms. When flashing in the future, use the motherboard vendor’s files/utilities and stable power (UPS recommended), then load defaults and reconfigure only the required settings.

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Member Avatar for f575gtc

yeah thats not your pc its your house, you problay have a polterguiest living there thats messing with you, umm garlic and a cross should fix the problem, but if it doesn't just unplug your pc for the power

Member Avatar for caperjack

. It appears that its trying to send an at command? .

What is an at command .!!And how do you know its trying send one !1never heard of a computer that could boot when shut down !

Member Avatar for ultrasquare

What is an at command .!!And how do you know its trying send one !1never heard of a computer that could boot when shut down !

An AT command is used to do a wake up to the modem to get its attention.
I reviewed the security and system logs in the event viewer.
I know this start up thing is very weard.

Member Avatar for Zachery

does your bios have any time managent tools?

Member Avatar for Paladine

And what kind of modem at you using that requires you to type AT commands directly too, for it to wake up? That is like the old days of Windows 3.11 or even older. Commodore 64 Days.

Never ran across a modem in the last 5 years that needs
to be "awakened".

How do you know it is trying to send an AT command? Tried removing the modem?

Have you installed XP Service Pack?

Member Avatar for )BIG"B"Affleck

That is like the old days of Windows 3.11 or even older. Commodore 64 Days.

Hhaahahahaha.....that was good!!!! commodore..............now thats old school like WANG

Member Avatar for ultrasquare

Faranth: All my bios startup managment tools are disabled.

Paladine: Using US Robotics. An AT command is the standard wake up to all modems. The modem is not the problem works fine with win98. All microsoft updates are current. By reviewing the "Event viewer" you can see the history of what is happening on your pc.

Member Avatar for TallCool1

Just installed xp home. Every day my pc boots up (when powered off) and goes to login page (this occurs at the same time daily). I have disabled all bios start up features. It appears that its trying to send an at command? this does not happen when i use my old 98 drive. Auto updates is desabledand some tasks (messenger, remote registry...)
I have the latest service pack and all updates installed to date.

It has to be in the BIOS. Think about it; if the unit is turned off, there is no OS to send an "ON" signal to the hardware, only a timed-turn-on "alarm clock" mode in the BIOS.

Try resetting the BIOS using the CMOS-reset jumper and reprogram it.

Member Avatar for ultrasquare

I installed the Bios upgrade and still had same problem.
I reset the bios to defaults and problem went away.
Sooo flash was currupt and it didn't show that daily turn was activated.
Thanks all.

Member Avatar for caperjack

a reset of bios default/save changes is reccomended on the first boot after a flash !

Member Avatar for Zachery

i dont see any way SOFTWARE on the harddrive is rebooting or starting your computer not with out it already being powered up

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