Service pack 1 failed

Hi all. Hope someone can help me!
I have Windows Vista Home Premium. I tried to install service pack 1, using
automatic update and downloading and executing standalone file.
Both times computer block during the instalation displaying :
!!0xc01a001d!! 29026 / 74981 (\Registry\machine\schema\wcm://Microsoft...)
I had to cut the power to shut down computer.

Unlimited installation and compatibility support for Vista SP1 is available
at no charge through 18 Mar-09
https://support.microsoft.com/oas/de...4&gprid=500921
<=US-specific page

Windows Vista Service Pack 1 - Things to Know Before You Download:
http://technet.microsoft.com/en-us/w.../bb968859.aspx

Windows Vista Help: Learn how to install Windows Vista Service Pack 1 (SP1):
http://windowshelp.microsoft.com/win...6f2021033.mspx
--
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Desktop Experience - since 2002
AumHa VSOP & Admin http://aumha.net
DTS-L http://dts-l.net/


João Melo wrote:
> Hi all. Hope someone can help me!
> I have Windows Vista Home Premium. I tried to install service pack 1,
> using
> automatic update and downloading and executing standalone file.
> Both times computer block during the instalation displaying :
> !!0xc01a001d!! 29026 / 74981 (\Registry\machine\schema\wcm://Microsoft...)
> I had to cut the power to shut down computer.