I had an issue after the last set of updates. It installed the updates and rebooted, and I started getting a steady stream of low level writes to my main hard drive. I thought it was malware or something. When I rebooted trying to track down the cause, it wouldn't boot back up. it kept bluescreening on the way up saying there was an error on the hard drive. I tested the drive with OCZ's toolbox, but it came back clean. I reimaged from a backup and it came up fine. I reinstalled the latest updates, and the low level writes came back. I rebooted and it went back to the same old bluescreen. Right now, I'm holding back on updates until this is resolved, keeping my backups current.