Windows 7 - Error Code: 0x643

Asked By An on 17-Dec-07 07:27 PM
I am getting Error Code: 0x643 for version Windows XP Professional.  How do I
fix this problem?

TaurAria replied on 17-Dec-07 09:28 PM
Usually associated with a Framework update?

When you try to install an update for the .NET Framework 1.0, 1.1, or 2.0,
you may receive Windows Update error code "0x643" or Windows Installer error
code "1603"

If that's not the case Ant, please provide further information.
PA Bear replied on 17-Dec-07 09:28 PM
When are you getting the error and what are you attempting to install?
~Robear Dyer (PA Bear)
MS MVP-Windows (IE, OE, Security, Shell/User)
AumHa VSOP & Admin
Ka replied on 18-Dec-07 11:57 AM
I get the same error when trying to install
Security Update for Microsoft .NET Framework, Version 1.1 Service Pack 1

I am using XP  Home
An replied on 21-Dec-07 12:13 PM
Security Update for Microsoft .NET Framework, Version 1.1 Service Pack 1
An replied on 21-Dec-07 12:14 PM
How do I fix the problem?
An replied on 21-Dec-07 02:25 PM
I went to the website but I'm unable to install the .NET Framework 1.0
Service Pack 3, on the website that you gave me.  I was able to install the
other 4 programs though.  I'm still unable to install the security update
service pack 1.1 I think that's what it's called that was the cause of the
0x643 error message.
PA Bear replied on 21-Dec-07 03:49 PM
Start a free Windows Update support incident request:

Support for Windows Update:

For home users, no-charge support is available by calling 1-866-PCSAFETY in
the United States and in Canada or by contacting your local Microsoft
subsidiary.  There is no-charge for support calls that are associated with
security updates.  When you call, clearly state that your problem is related
to a Security Update and cite the update's KB number (e.g., KB123456).

For more information about how to contact your local Microsoft subsidiary
for security update support issues, visit the International Support Web

For enterprise customers, support for security updates is available through
your usual support contacts.
~Robear Dyer (PA Bear)
MS MVP-Windows (IE, OE, Security, Shell/User)
AumHa VSOP & Admin;
Robert Aldwinckle replied on 22-Dec-07 12:42 AM
F:\>set /a c = 0x643
F:\>net helpmsg %c%

Fatal error during installation.

Looks like you need to go into the logs and find the real problem.
This is undoubtedly just a summary code for a more significant
message which would have been issued earlier there.

BTW there is an abundance of diagnostics available with these installs
if you look for it.   If you're lucky you might even find a more precise clue
more easily in the Event log or if you install the same update manually
you may get shown some messages which get suppressed by doing
the install automatically.   Also, when you do an manual install you have
the option of invoking verbose logging, if it is not already in effect.

Good luck

Robert Aldwinckle
Moll replied on 29-Jan-08 08:05 AM
Ive  been  getting  error  code   0x643    for  the  last   4  days   but
the  update  is already  installed  Thankyou  Molly
M  Richardson
PA Bear [MS MVP] replied on 29-Jan-08 10:51 AM
Windows version?  Which update(s)?
DipyDaw replied on 29-Jan-08 10:12 PM
I am also getting this error message...but mine is coming from when I try to
trying to download the update to Windows Media Player 11 and it stops, tells
me that I have an Unsupported operating system and to download the update
rollup 2 before it can continue with the Player installation.  I've already
attempted to remove and then reinstall the .NET framework files...that didn't
fix my issue...any other ideas?
PA Bear [MS MVP] replied on 30-Jan-08 12:18 PM
Is Windows Update or Automatic Updates offering you KB900325 or the WMP11
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Desktop Experience - since 2002
AumHa VSOP & Admin
DipyDaw replied on 30-Jan-08 01:45 PM
It is offering me the KB900325 which is the "Update Rollup 2 for Windows XP
Media Center Edition 2005 will not update the WMP11 without it...
PA Bear [MS MVP] replied on 30-Jan-08 02:43 PM
[Update Rollup 2 for Windows XP Media Center Edition 2005 was released over
2 years ago.  Why haven't you installed it by now?  Is Automatic Updates
enabled and functioning properly?]

More Information

Note: To install this update, you must have Microsoft .NET Framework 1.1 and
.NET Framework 1.1 SP1 installed. Windows Update detects whether these
packages are installed. Windows Update automatically installs these packages
for you.

If the 886904 update is installed, you must uninstall the 886904 update
before you install Update Rollup 2 for Microsoft Windows XP Media Center
Edition 2005. Otherwise, the .NET Framework 1.1 SP1 installation will not

If "Microsoft .NET Framework 1.1 Hotfix (KB886904)" is listed in Add/Remove
Programs, uninstall it; Then check to see if Microsoft .NET Framework 1.1
and/or Microsoft .NET Framework 1.1 Service Pack 1 (SP1) is listed in
Add/Remove Programs.

How to determine which versions of the .NET Framework are installed and
whether service packs have been applied:
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Desktop Experience - since 2002
AumHa VSOP & Admin
DipyDaw replied on 30-Jan-08 03:06 PM
For starters, I'm not a computer guru....but I do updates regularily and
automatic updates are enabled...I don't know why it wasn't installed before
now...possibly because it's not listed as a critical update...Your response
sounded to me accusatory and made me feel indiotic...just forget I asked.
PA Bear [MS MVP] replied on 30-Jan-08 06:23 PM
Have a /wonderful/ day!
readyforanythin replied on 06-Feb-08 09:19 AM
I'm having the same problem, but its only annoyed me enough the last couple
of weeks to do anything about it (I hate those little red question marks!)
I have XP home SP2; .NET 3.0 SP1, WMP11; and the only thing MS Update keeps
popping up is that bloody "Update Rollup" (see below)
It may well have been released over two years ago, but it 1st appeared in my
Update list in sept '07 (yes, automatic updates is turned on)
bonnie12 replied on 02-Apr-08 09:01 AM