I received complaints about problem on install the Windows Vista Service Pack 1. They getting this message:

Windows Vista Service Pack 1 is not available for installation from Windows Update and is not offered by Automatic Updates.

It could be due to some causes that causing Windows Update fail to install the SP1. Here is some of the causes:

• You are already running Windows Vista SP1.
• Windows Vista SP1 has not been released for the language of the language pack that you have installed.
• Windows Service Pack Blocker Tool is used to block the delivery of Windows Vista SP1 from Automatic Updates or from Windows Update.
• A hardware device driver or device software was problematic when you updated to Windows Vista SP1.
• You have installed a pre-release version of Windows Vista SP1.

Here is a list of drivers that don’t work well with Windows Vista SP1:

Audio drivers:

• Realtek AC’97
  • For x86-based computers: Alcxwdm.sys - version 6.0.1.6242 or earlier
  • For x64-based computers: Alcwdm64.sys - version 6.0.1.6242 or earlier
• SigmaTel
  • For x86-based computers: Sthda.sys - version 5.10.5762.0 or earlier
  • For x64-based computers: Sthda64.sys - version 5.10.5762.0 or earlier
  • For x86-based computers: Stwrt.sys - version 6.10.5511.0 or earlier
  • For x64-based computers: Stwrt64.sys - version 6.10.5511.0 or earlier
• Creative Audigy
  • For x86-based and x64-based computers: Ctaud2k.sys - version 6.0.1.1242 or earlier
  • For x86-based computers: P17.sys – all versions (This was originally a Windows XP-based driver.)
• Conexant HD Audio
  • For x86-based computers: Chdart.sys - version 4.32.0.0 or earlier
  • For x64-based computers: Chdart64.sys - version 4.32.0.0 or earlier

Biometric (Fingerprint) Sensors:

• AuthenTec Fingerprint Sensor with the Atswpdrv.sys driver file – version 7.7.1.7 or earlier
• UPEK Fingerprint Sensor with the Tcusb.sys driver file – version 1.9.2.99 or earlier

Intel Display drivers:

• For x86-based computers: Igdkmd32.sys – versions between and including driver 7.14.10.1322 and 7.14.10.1403
• For x64-based computers: Igdkmd64.sys – versions between and including driver 7.14.10.1322 and 7.14.10.1403

Other drivers:

• Texas Instruments Smart Card Controller with the GTIPCI21.sys driver file – version 1.0.1.19 or earlier
• Sierra Wireless AirCard 580 with the Watcher.exe application – version 3.4.0.9 or earlier (This application is located in the AirCard 580 Program Files folder.)
• Symantec software driver for Symantec Endpoint Protection and for Symantec Network Access Control clients
  • For x86-based computers: Wgx.sys – versions 11.0.1000.1091 or earlier
  • For x64-based computers: Wgx64.sys – versions 11.0.1000.1091 or earlier