Member Avatar for EntangledDesi

I know that there are countless threads already on this, but even after trying all those suggestions I still can't seem to resolve the issue.

I was installing BitDefender and had to restart the computer. The computer would boot up and seem to be loading Windows, but then it just goes blank, and the keyboard and the mouse don't seem to be getting power either.

I've tried booting into the last good known configuration and that does the same thing as above.
Booting into Safe Mode gives me the BSOD:
STOP: c000021a (Fatal System Error)
The Windows Logon Process System process terminated unexpectedly with a status of 0xc00000139 (0x0000000 0x00000000). The system has been shut down.

I've tried to repair Windows XP..but the computer won't boot from the CD..and I've checked the BIOS and that all seems to be fine It's setup to book from CD-ROM first, but it's not..

I don't know what else to do and would appreciate any help I could get.

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  • Latest Post Latest Post by Bob_180_Bob

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Practical, low-cost recovery steps based on 's report and 's BIOS-reset suggestion. Prioritize rescuing personal data, then run offline checks and repairs. On older systems the fastest, most reliable path is to work from a second machine or a boot/rescue environment so the damaged installation is not repeatedly stressed.

Recommended sequence (no new hardware required if a spare PC or IDE/USB adapter is available): remove the problem drive and attach it as a secondary disk to a working Windows PC (or mount it in a USB-to-IDE enclosure). Immediately copy user folders (Documents and Settings or Users) to external media. Then run an integrity and sector scan and an offline antivirus scan from the host machine.

chkdsk /r D:

(Replace D: with the attached drive letter.) After chkdsk, run an up-to-date on-demand scanner (Malwarebytes, Microsoft Safety Scanner, or an equivalent) against the attached volume. Only after personal data is safe, attempt repairs.

If a second PC is not available, create a bootable rescue environment (lightweight Linux live CD/USB or a Windows PE-based rescue disk) on a working machine and boot the problem PC from that media. If optical boot repeatedly fails on older BIOSes, check the drive power/IDE cable and master/slave jumpers or try a different optical drive or an external USB optical drive. From a recovery console, useful repair commands are:

fixboot C:
fixmbr
chkdsk /p C:

Advanced repair: if system hives are corrupt, an offline registry restore from the installer/repair copies can sometimes recover a bootable system. Always backup the current config folder before replacing files:

md C:\backup_config
copy C:\Windows\system32\config\* C:\backup_config\
copy C:\Windows\repair\* C:\Windows\system32\config\

These last steps are higher risk—keep backups and prefer data rescue first. If hardware fiddling is uncomfortable, transferring the drive to a friend or a repair shop for a controlled offline scan/backup is the safest option.

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Member Avatar for Bob_180_Bob

Hi,
First up try resetting the BIOS by removing the motherboard battery for a few minutes then replace, reset the BIOS to CD first boot and try again.
If that will not work, please post more information about your PC

Member Avatar for EntangledDesi

Okay, I've tried that and it still won't boot from CD.
It is an older Gateway LP Mini Tower TB Essential 500
Pentium III
Processor Speed 500 MHz
Front Side Bus 100 MHz
Cache RAM 512 KB
System Memory 320 MB
Hard Drive 19 GB
NVIDIA Vanta/Vanta LT Video Card
Creative Sound Blaster with Line In/Out/Mic

Member Avatar for Bob_180_Bob

Hi, P3.. it is not worth trying to boot anyway.
Sorry I can not help you.

Member Avatar for EntangledDesi

I know it's not worth it, but is there any way of getting it to boot without having any expenses?

Member Avatar for Bob_180_Bob

Hi,
I was serious when I said I can not help you, I have no idea how to fix it, but the only way I would boot it is with a size 10 boot.

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