Good news: Microsoft finally fixed the Windows Update v6 site so that it no longer causes svchost.exe to hang and use 100% of the CPU for hours. In the past, the only options were waiting for who knows how long, installing patches manually via the Update Catalog, or trying your luck with some hotfixes.

Bad news: since last month or so, the POSReady 2009 update patches require a processor that supports SSE2 instructions, so if you have an Athlon XP or a pre-4 Pentium, no more updates for you.

Worse news: Windows 7 security patches will also require SSE2.