Microsoft confirmed Tuesday that two of the 12 security bulletins issued last week affect Windows Vista Beta 2, the widely-used preview, and posted download instructions for the first security updates to its next-generation operating system.

"We are committed to releas[ing] Windows Vista updates for all MSRC [Microsoft Security Response Center] critical class issues that may arise during the beta testing period," wrote Alex Heaton, product manager for the Windows Vista security team, on the group's blog.
TechWeb