Just over a year after Vista was released, Microsoft has announced the completion of Vista’s first Service Pack (SP1). The code has been sent for manufacturing and OEM partners will start rolling out new PCs with Vista SP1 preloaded shortly. Even though, SP1 is released to OEM partners, it won’t be available for retail users until mid-march.
In mid-march, Vista SP1 will be available in 5 different languages (English, French, Spanish, German and Japanese) either through Windows Update (as an optional update) or directly from Microsoft’s website. Somewhere around mid-April, Vista users who have opted to receive Windows Update automatically will get Vista SP1 automatically.
Microsoft has identifies certain problematic drivers during the testing phase of SP1. Users running those drivers won’t be getting SP1 through Windows Update until hardware manufactures release an update to their drivers. SP1 in other languages will RTM in April.

wrote, on February 5th, 2008
Hopefully this will fix the many bugs in vista.
wrote, on February 6th, 2008
So is it available now? Il go check if i can update.
wrote, on February 7th, 2008
Rapidshare: Not yet, but will be available via Windows Update in mid-march.
wrote, on February 8th, 2008
[...] SP1 has been released to manufacturing, but due to specific related driver issues, Microsoft has decided not to release it via Windows [...]
wrote, on February 8th, 2008
What drivers have problem?