Official description
Windows Vista Service Pack 1 is an update to Windows Vista that addresses key feedback from our customers. SP1 addresses specific reliability and performance issues, supports new types of hardware, and adds support for several emerging standards.
Languages included: English (US), French, German, Japanese, or Spanish (Traditional)
Keep in mind that this is the standalone version, if you don’t want to download the whole thing separately its available via Windows Update which is said to be smaller in size.
36 Language version will be available in April
Download Vista Sp1 (32bit) (5 Language Standalone)[Size->434.5MB]
Download Vista Sp1 (64bit) (5 Language Standalone)[Size->726.5MB]
