netlogo One of the more annoying problems we run into when trying to ‘fix’ a computer and get all Windows Updates installed is .NET Framework v1.1 Service Pack 1 (SP1) from KB867460. Of all patches, this one seems to fail the most. It will fail in Windows Update or installed manually. A lot of people just leave the failed update since they don’t use .NET (or have no clue they use something that does). We recently had a client who used a software package to run their business that was built on .NET, so we wanted to ensure they had the latest updates and patches. But all of their computers refused to install SP1. Thankfully there are a couple of tools which can help fix the problems.