As promised, Microsoft today started offering Windows 7 Service Pack 1 on Windows Update.

Earlier this month, Microsoft set Feb. 22 as the Windows Update launch date for SP1.

"Starting today, Windows 7 Service Pack 1 will be available to everyone via the Microsoft Download Center and [will] start rolling out via Windows Update," said Microsoft spokesman Brandon LeBlanc in a Tuesday post to the Windows blog.

When delivered via Windows Update, Windows 7 SP1 weighs in at approximately 750MB for the 32-bit version, just over 1GB for the 64-bit edition.

More: http://www.computerworld.com/s/article/9210742/