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Can't install OS ... Help!

by PCeanadach / April 1, 2006 7:10 PM PST

My mother-in-law has a fairly old PC that ran on MS-Millennium. Yes, I know it's crap so please don't remind me. The PC died a death a couple of days ago and I was asked if I could have a look at it. I brought it home, set it up and booted. Power supply appears to be okay, HDD ditto, both lights were on. Having said that there were no 'beeps', and the monitor, mouse and keyboard were as dead as a dodo. I did the obvious, I changed the power supply, and this time there was 'beeps', and all the usual lights, keyboard and mouse came to life. It wouldn't boot. I suspected that the OS had been corrupted in some way and decided to clean the drive and start clean. I fdisk'd and reformated the HDD, and using EZ reinstall I attempted to replace the OS ... it was having none of it. I kept / keep receiving the message; "Standard Mode; fault in MS-Dos extender" followed by these letters and numbers; EC=0000, CS=0053, IP=232F, AX=0000, BX=0FEE, CX=0000, DX=FFF0, SI=35EC, DI=FFE8, BP=0000, DS=004B, ES=0000, SS=004B, SP=00E2.
Regardless of what I try, this message reappears halting the reinstalation. I have even tried wiping the HDD and installing MS-Dos 6.22 ... Win 3.1 ... Win 95 ... Win 98 ... and nothing seems to work.
If anybody has any (sensible) ideas, I would be very grateful.

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If any of those OSes won't install...
by R. Proffitt Forum moderator / April 1, 2006 9:50 PM PST

You have proven something is wrong with the machine. The extender errors usually indicated bad ram.

Look up MEMTEST86 and try that test.

Best of luck,


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Some suggestions
by TONI H / April 3, 2006 2:06 AM PDT

one of them being that the error may be generated because you used a third party program to set up the drive (the EZ Installer)....

Fault in MS-DOS Extender -
The document goes on to explain several conditions that may cause the error.

Bad Fault in MS-DOS Extender

This error message occurs when the fault handler dispatcher in DOSX.EXE generates another cascaded fault while trying to handle a protected-mode exception. This error is usually caused by one of the following factors:

HIMEM.SYS is unable to control the A20 line.

DOS=HIGH is not functioning properly (related to HIMEM.SYS control).

The RAM, static RAM (SRAM), single in-line memory module (SIMM), or dynamic RAM (DRAM) chips are not functioning properly.

You are running DR DOS.

The third-party memory manager is not configured correctly.

The EMM386.EXE NOEMS x=A000-EFFF line is missing from the Config.sys file.

You have an old, out-of-date ROM BIOS.

Your CMOS settings are incorrect.

Your Windows files are old or corrupted. To test this, create a new directory on the hard drive, and install Windows in that directory.

Your disks are corrupted.

Your system is infected with the Form, Forms, Noint, or Yankee Doodle virus.

You may have a simple line left out in your Autoexec.bat file or your Config.sys file loading Himem.Sys or a "Form Virus" acting on your BIOS.
Check out all of the suggestions in the above mentioned document


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Can't Load OS
by PCeanadach / April 3, 2006 4:51 AM PDT
In reply to: Some suggestions

Thanks for the info Tony, I'll check it out and let you know how it goes :-))


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