Full Windows version of the machine in question (e.g., WinXP SP3; Vista SP2)
is...? Assuming it's Vista and the error is actually 0x800F0900
(CBS_E_XML_PARSER_FAILURE), there is a very good chance that you are seeing
the effects of a hijackware infection!
NB: If you had no anti-virus application installed or the subscription has
expired *when the machine first got infected* and/or the machine's not been
kept fully-patched at Windows Update, don't waste your time with any of the
below: Format & reinstall Windows. A Repair Install will NOT help!
1. See if you can download/run the MSRT manually:
NB: Run the FULL scan, not the QUICK scan! You may need to download the
MSRT on a non-infected machine, then transfer MRT.EXE to the infected
machine and rename it to SCAN.EXE before running it.
2. [WinXP ONLY!! =>] Run the Windows Live Safety Center's 'Protection' scan
(only!) in Safe Mode with Networking, if need be:
3. Run a /thorough/ check for hijackware, including posting the requested
logs in an appropriate forum, not here.
Checking for/Help with Hijackware
**Seek expert assistance in
or other appropriate forums.**
If the procedures look too complex - and there is no shame in admitting this
isn't your cup of tea - take the machine to a local, reputable and
independent (i.e., not BigBoxStoreUSA) computer repair shop.
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
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Desktop Experience - since 2002
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Client - since 2002
> I have mobile user which is not managed with company WSUS. The user
> is confident with applying updates manually. Currently the user is
> getting a Error 008F0900 when running Windows Updates. This has
> happened before but somehow fixed itself. Now it is back and
> searching for answers are resulted in no answers. Found plenty of
> post from other users and even MS site, but not solid solution.
> When I configure this machine to be managed with company WSUS, updates
> are reaching the machine.
> Need any input on fixing Error 008F0900.
> Thanks in advance