Винда вырубается и появляется синий экран с надписьюpfn_list corrupt и приситствует соответствующий код ошибки

Здесь коды ошибок BSOD.

When you use a Windows 2000-based computer, you may receive the following error message on a blue screen:
STOP 0x0000004E PFN_LIST_CORRUPT (Parameter1, Parameter2, Parameter3, Parameter4

1 - value 1
2 - ListHead value which was corrupt
3 - number of pages available
4 - 0

1 - value 2
2 - entry in list being removed
3 - highest physical page number
4 - reference count of entry being removed

CAUSE
This behavior occurs because a driver or other problem damaged the input/output (I/O) driver structures.

MORE INFORMATION
To troubleshoot this behavior:
1.Run hardware diagnostic tools that are provided by your computer manufacturer.
2.Disable all file system filter drivers, such as backup utilities, virus scanners, or firewall software.
3.View the following Microsoft Web site to verify that the hardware and the drivers for the hardware are compatible with Windows 2000:
http://www.microsoft.com/whdc/hcl/default.mspx
For information about the hardware on your computer, contact the manufacturer.
4.If you receive this error message randomly, or when you try to start a program, remove extra memory or have the random access memory (RAM) in your computer tested. This behavior may occur if you have bad RAM.

дофига

спасает sfc /scannow в ком строке, попросит диск с виндой, а потом при загрузке F8 и выбери восстановление службы каталогов =)