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Error number: 0x8007043C

Windows Update

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Old 30-05-2005
Posts: n/a
Error number: 0x8007043C

when i go to search my udates...the window updates encount a problem....
plz help~

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Old 30-05-2005
Rich Barry
Posts: n/a
Peter, The Great Google has a few possible answer
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Old 30-05-2005
Posts: n/a
RE: Error number: 0x8007043C

I discovered I also had this problem within 1/2hr. of your post. I searched
this forum back into April and found no other references to 0x8007043C. Maybe
it is a new trojan just released today? Here is some more background on my
experience, tell me if this sounds familiar: I formatted a new HDD and
installed my old Windows XP disk ("SP0?"). I went to Windows Update to start
the update process. 66 updates had to install (30 min on cable modem) before
I would be able to install SP2. At the end of this first phase there was the
black Windows XP screen and a message, "Please Wait". Keyboard and mouse were
responsive but this remained unchanged for about an hour so I reset. Now when
booting normally I get to the black WinXP screen and then all keyboard lights
come on for 1/2sec. Then they all go black. Then the WinXP image disappears
and the monitor blinks due to loss of signal. HDD light blinks furiously, it
seems busy. I can reboot in safe mode w/networking but at Windows Update I
get 0x8007043C after selecting Express or Custom.

Do you have a file in your root C: directory called "pagefile.sys" that is
several Gb in size? I do and I can't delete it, it's "in use by another
person or program".

Maybe a vulnerability in SP0 or SP1 has been comprimised, preventing us from
updating to SP2? This sucx, like a chicken & egg thing. How do I get an
updated (secure) OS if the only way is to expose myself on the www while
updating with an insecure OS? I was hoping it was just a hardware problem but
I didn't have the problem before connecting to the internet for a Windows
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Old 10-06-2005
Posts: n/a
Re: Error number: 0x8007043C

One way you could solve the problem of how to update an insecure OS version
when one has to connect to the internet is to slipstream SP1 then SP2
updates. Do a search on this group for instructions. You would then end up
with a CD that has an updated OS. I am not certain what to do about the
other dribbling updates - doesn't the SP usually incorporate all updates up
to the SP date (unless documented otherwise)?
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Old 05-10-2005
Posts: n/a
Ive been trying all last nite and today to install sp2 it keeps giving me
this error code and i cant find what it means anywhere else..can you help??

I agree, I accessed my internet thru Win safe mode because I did not have any
other choice. I cannot access my internet (DSL) and update; it works just
fine in safe mode. I have Norton antivarius and just updated it. I need help
badly?Anyone out there who can help? Thanks so much.
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Old 05-04-2006
Posts: n/a
RE: Error number: 0x8007043C

It appears that the IS a new variant of a Sasser worm...
I have been cleaning both the sasser and Baegle variants.

The PC i am working on seems to be hijacked on the normal windows desktop.
Progams appear to boot then dissapear.

Only method to access the internet is to use SAFE MODE.
when trying to run update, i get error codes as above?
"Error number: 0x8007043C"

is there any way to download the SP2 from an FTP?
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Old 05-04-2006
Guilherme Carnevale
Posts: n/a
Re: Error number: 0x8007043C

Open a new command prompt and execute the following commands:

regsvr32 wuapi.dll
regsvr32 wuaueng.dll
regsvr32 wuaueng1.dll
regsvr32 wucltui.dll
regsvr32 wups.dll
regsvr32 wuweb.dll

Guilherme Carnevale
MVP Windows Shell/User
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Old 16-10-2006
Posts: n/a
Error number: 0x8007043C

Can someone help me to resolve this error??? This results from attempting to
scan my PC for downloads, but the scan fails and MY PC WILL NOT WORK!!! I
have to be in safe mode just to get to this site to post my problem.
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Old 10-11-2007
Posts: n/a
RE: Error number: 0x8007043C

TaurArian, repeating your response that should be meant to help; though
probably defines ostensibly what the error code means, but many of the people
only have SAFEBOOT available for internet connections. I have the same
problem, and I believe it's caused by a powerful worm, because update is only
one thing inaccessible to me. I get errors that Admin policy prohibits
downloading certain programs (oddly only things that would help me fix the
problem); links in pages sometimes start to open once after trying longtime,
then when clicked again, nothing happens. Since I can only control my
computer in Safe Mode, but sometimes can squeak through the download of
programs, what program/s should I try to obtain to try to fix this, please?
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Old 10-11-2007
Posts: n/a
RE: Error number: 0x8007043C

TaurArian, I meant to say: your definition is no doubt right, but seems not
to be helping a lot. Perhaps the Update error is really for most of us just
another symptom of something sinister - like a worm or trojan, etc. BTW I'm
running XP on Vaio Laptop.
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Old 11-11-2007
Posts: n/a
Re: Error number: 0x8007043C

Hal, this is a Windows Update Newsgroup. Windows Update cannot be ran in safemode and
nothing I say or do will change that.

If safe mode is the only option available to a person, then obviously there is a problem
which needs to be fixed before that person can run windows updates.

If the problem is related to a virus or something then there are Newsgroups available to
assist in that area -

Security - Viruses OE client -
orWeb client -
If the safeboot option is only available and not due to a security problem then perhaps
the XP General Newsgroup -

Windows XP Newsgroups
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Old 11-05-2008
Join Date: May 2008
Posts: 1

I have the same problem.
I downloaded Service pack 3, which required the PC to restart after installation. On restart Windows did not start successfully and I got a black screen apologizing for the inconvenience and giving me the option to start in safe mode, or start normally or go back to the last setting that worked.

Neither start normally nor go back worked, but I could start in safe mode with network.

I tried to update Windows and got this error message 0x8007043C.

I'm not technical so any step by step suggestions would be greatly appreciated...
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Old 11-05-2008
Posts: n/a
Re: Error number: 0x8007043C

Translation: You need a service which is not available in safe mode.
Windows Update will not run in safe mode.

Please contact MS for assistance -

Microsoft Windows XP Service Pack 3 (All Languages)

Free unlimited installation and compatibility support is available for Windows XP, but
only for Service Pack 3 (SP3). This support for SP3 is valid until April 14, 2009. For
more information about this policy, visit the Windows XP Support Lifecycle page located at
http://support.microsoft.com/lifecycle/?p1=3223. Chat and e-mail support is available only
in the United States and Canada. For all other Windows XP issues, visit the Help and
Support site at http://support.microsoft.com/oas/def...spx?gprid=1173, and then choose
your product.

• US:

• CA:

• UK:

• AU:

• Other:
select Windows XP | select Windows XP Service Pack 3
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Old 01-04-2009
shaun white
Posts: n/a
Re: Error number: 0x8007043C

hi mate. im just unsure on one thing you wrote when you say execute do u mean
delete the files below. im just a little unsure on what you mean by execute
and before i type into the command promt i just want to make sure i
understand what you mean. as it could also mean terminate the files from
working basically im saying it just disables them from use. the firewall on
sp2 has stopped my internet from responding in normal mode when i use "safe
mode networking" the internet works fine. please could you help me with this
problem and give me full details on how i can resolve this annoying problem
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Old 29-10-2010
Join Date: Oct 2010
Posts: 2
Re: Error number: 0x8007043C

That's funny ya'll are getting this error 0x8007043C on XP. I'm getting the error within Security essentials on Win7. Unlike the rest of you so far I can update normally, but security essentials will not let me open it in normal mode. I can open security essentials in safe mode but in trying to update the definitions, it is there I get that error and stating to make sure I am connected to the internet. And no amount of starting or stopping the service helps me. So if anyone knows what's going on with Security Essentials please let me know.
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