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Installing Patch On Pc Which Won't Boot?


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#1 rowal5555

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Posted 23 March 2006 - 02:49 AM

A friend's PC Stops booting with the above error message. My research has come up with
[Windows XP Patch: Fix for STOP 0x0000007E error in aec.sys - KB900485

Applies to:
Windows XP with Service Pack 2

Requirements
Windows XP with Service Pack 2

File Size
0.5MB

File Name
WindowsXP-KB900485-x86-ENU.exe

Author/Supplier
Microsoft

[Click here to Download]


Description
This patch for Windows XP fixes a bug in Windows XP that can cause a STOP 0x0000007E error in aec.sys (also called the 0x7E stop error). The full message may read 'STOP 0x0000007e (parameter1, parameter2, parameter3, parameter4) aec.sys'. These parameter values can vary between systems and may look like, for example, 0xC0000005, 0x00000000, 0xF8954384, 0xF8954080.

Don't worry too much about this gibberish, they are not going to help you. However, this patch from Microsoft should fix the problem. The source is a little cryptic, but if you are interested, it is a timing error in the aec.sys file that causes the crash.]


I can download the patch to CD on my PC but my question is, how do I get the fix into the other PC? If I insert the CD into the faulty machine then reboot, will the patch load???

Information from the MS site follows but does not answer my question -

[Error message in Windows XP Service Pack 2: "Stop 0x7E"
View products that this article applies to.
Article ID : 900485
Last Review : January 6, 2006
Revision : 1.0
On This Page
SYMPTOMS
CAUSE
RESOLUTION
Update information
Prerequisites
Restart requirement
Update replacement information
File information
APPLIES TO
SYMPTOMS
You may receive a Stop error message that is similar to the following on a Microsoft Windows XP Service Pack 2 (SP2)-based computer:
STOP 0x0000007e (parameter1, parameter2, parameter3, parameter4)
aec.sys
Note The parameter values may vary.

This error may occur during startup or after you have started the computer.
Back to the top
CAUSE
This problem occurs because of a timing issue.
Back to the top
RESOLUTION
Update information
The following file is available for download from the Microsoft Download Center:

Download the 900485 package now.

Release Date: December 20, 2005

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
Prerequisites
To apply this hotfix, you must have Windows XP SP2 installed on the computer.
Restart requirement
You must restart the computer after you apply this hotfix.
Update replacement information
This update does not replace any other updates or any hotfixes.
File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

File name File version File size Date Time Platform
Aec.sys 5.1.2601.2180 142,464 27-May-2005 23:14 x86
Back to the top
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Back to the top
Back to the top
APPLIES TO
• Microsoft Windows XP Home Edition
• Microsoft Windows XP Professional
Back to the top
Keywords:
kbwinxpsp3fix kbwinxppresp3fix kbexpertiseinter kbqfe kberrmsg KB900485
Back to the top ]

Any answers much appreciated. Cheers, ROB.

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#2 Albert Frankenstein

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Posted 23 March 2006 - 04:21 AM

There can be many causes for a 0x7E stop message. I refer you to Microsoft's Knowledge Base on the subject HERE. To determine the cause of the stop message, you need to know it's context. In other words, what else is going on with this computer right before this error message started coming up? Is this computer infected? Was it recently upgraded? New hardware added? Too many devices plugged into the USB ports? Etc, etc, etc.

Look down the list of Knowledge Base articles at the link above and see if any of those fit the situation.
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#3 rowal5555

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Posted 23 March 2006 - 04:37 AM

Thanks. I see what you mean. As far as I'm aware, this error occurred during a normal startup, but I will check. AVG, Zone Alarm and several anti-spyware running and up to date.

Is it possible to get past the STOP so the patch can be installed?

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#4 Albert Frankenstein

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Posted 23 March 2006 - 07:28 AM

Can you boot into safe mode by hitting F8 while booting up and choosing 'safe mode' from the list of options that comes up? Or "Last Known Good Configuration"?

Also, explain exactly what happens, i.e. when in the booting process the stop message appears, is it always the same stop message, how do you get past it, etc.

Another suggestion is to be sure you are downloading the fix from Microsoft. Personally, I don't trust anyone else. The download is HERE. It is for XP computers with Service Pack 2 only. (right click on My Computer > Properties to see if you have SP2 or not). It also requires validation of your copy of XP, so you must have a legitamite copy of XP.

Edited by Albert Frankenstein, 23 March 2006 - 07:39 AM.

ALBERT FRANKENSTEIN
I'M SO SMART IT'S SCARY!


Currently home chillin' with the fam and my two dogs!


#5 rowal5555

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Posted 23 March 2006 - 08:14 AM

Thanks for that. No problem about legit OS, and I will definitely go direct to MS. I did try 'Last Known Good Configuration' when I was there this afternoon but NO GO. I didn't have time to play with it today, but will tomorrow.

If it will boot up in SAFE MODE, can I download the patch then. I've never had occasion to deal with something like this before which is why I need all the help I can get. But it is now 0112hrs so I must get some sleep.

Cheers & Thanks

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#6 Albert Frankenstein

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Posted 23 March 2006 - 08:17 AM

Safe Mode w/networking might let you surf the internet. I guess I was asking about booting differently to see just how severe the booting issue is.

Get some sleep!

When you get in front of the computer again, document what happens so you can answer this question:

Also, explain exactly what happens, i.e. when in the booting process the stop message appears, is it always the same stop message, how do you get past it, etc.


Edited by Albert Frankenstein, 23 March 2006 - 08:19 AM.

ALBERT FRANKENSTEIN
I'M SO SMART IT'S SCARY!


Currently home chillin' with the fam and my two dogs!


#7 rowal5555

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Posted 06 April 2006 - 06:44 AM

Sorry for the delay, been flat out. The full error message is -
0x0000007E (0xC0000005)(0xF7E7A4D0)(0xF993EFC4)(0xF993ECC0) Timing error in aec.sys file.

In safe mode, it always stops at -
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS\System32\Drivers\Mup.sys - (can't get past this).

Clear as mud to me. Seems crazy that there is a patch but can't get it installed.

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#8 HitSquad

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Posted 06 April 2006 - 02:08 PM

Hi rowal5555.
You may be able to get by the hang on mup.sys in safemode by removing all usb devices before you power up. Besides bios stuff, thats one reason why I keep the old faithful PS2 keyboard and mouse handy. :thumbsup:
Want to fill us all in on how this whole problem got started?

#9 rowal5555

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Posted 07 April 2006 - 01:20 AM

Greetings All.

Ratted around in the junk box at work today and have a PS2 mouse and keyboard handy now. Supposed to be painting roof of friends house tomorrow but should get a chance to look at computer.

A search on MS (error 0x7 + aec.sys)took me straight to KB900485 which I have already installed on my PC, so have loaded this on to a CD-RW and will see if it will load into dud machine.

History is vague. Young Lord and Master (7yrs) says he was booting up normally when things locked up. Don't have any reason to doubt him, but have stressed the dangers of clicking on any query window without knowing what it says. He is a good kid and will take notice I think - he is having bad withdrawal thru not being able to access his email a/c. LOL.

Will keep you posted. Cheers

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#10 rowal5555

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Posted 08 April 2006 - 02:49 AM

Well. That didn't go too well.

Removed all USB items, plugged in PS2 mouse and keyboard, and rebooted. Came up with the same error msg. In safe mode, stopped at .....\Mup.sys again.

Any other suggestions welcome.

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#11 HitSquad

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Posted 08 April 2006 - 07:53 AM

Hi again rowal5555.
It had a 50-50 shot. Sorry it didn't let you get in to safe mode.
It's definetly a hardware\driver issue and the only other time I've seen safe mode hang at mup.sys was directly after XP was upgraded to SP2 on the first reboot. (Intel Prescott CPU issue).
At this point, a repair installation of XP would be my next choice.
You could take a quick look in cmos setup (bios) and make sure critical settings are correct (cpu, memory,peripheral's, etc) or set defaults, save and exit.

Edited by HitSquad, 08 April 2006 - 08:02 AM.


#12 rowal5555

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Posted 08 April 2006 - 08:04 AM

Thanks Hit Squad.

At the moment I feel as though a drop kick out the nearest window may be the answer.

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#13 Albert Frankenstein

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Posted 08 April 2006 - 08:19 AM

At the moment I feel as though a drop kick out the nearest window may be the answer.

Unfortunately computers make lousy boat anchors!
ALBERT FRANKENSTEIN
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#14 Herk

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Posted 08 April 2006 - 03:09 PM

Some of the problems that can prevent booting into Safe Mode are caused by Spyware Doctor, Norton, or commonly, InCD, a part of Nero. If you can get into regular mode, you can download a patch for InCD from Nero's website. Of course, if you can't get into normal mode, you can't update. InCD is used to make it possible to drop and drag files into a burnable folder.

#15 rowal5555

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Posted 08 April 2006 - 05:58 PM

Thanks Herk and All.

Cor!! Just Googled 'Mup.sys' and thousands have had this same problem. Trouble is, the suggested solutions are as varied as the complainants.

I'm not savvy enough to try half of the suggestions, so may have to just leave it to the 'experts'. Pity, as it is really satisfying to fix something yourself, but you know what they say - a little knowledge can be a dangerous thing.

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