FFFF error code. Fortunately, Microsoft have an excellent knowledge base article that describes what registry settings to delete to get it working again. After that, I could take the time to figure out why it was getting stuck. The update function had gone haywire, having stored close to a hundred thousand files, making the C WindowsSoftware. DistributionDownload folder a ridiculous 2. Adobe After Effects Evolution Download Windows' title='Adobe After Effects Evolution Download Windows' />GB in size, accounting for some 4. After stopping the Windows Update service, it is possible to just delete the folder. You can even delete the entire C WindowsSoftware. Distribution folder, thus resetting all of Windows Update, but Windows Update will require a lot more time on its next run. The sheer number of files caused that delete operation to take more than an hour. After that, I manually installed what is basically the Windows Update Update. It took a few hours of forensics and thumb twiddling, but finally all updates had gone through, including Vista SP2 and the system was running normally again. The disk thrashing had stopped, CPU usage was down to single digits and everything responded smoothly. Having a smoothly running system turned one complaining employee into a happy camper again. Adobe After Effects Evolution Download Windows