However if the underlying issue is due to CBS then we need to look at logs which are focused on that area. The classic WindowsUpdate.log or the new Get-WindowsUpdateLog cmdlet will log the failure from a Windows Update perspective. Out of memory and assorted performance issues In addition to CBS preventing updates from installing, I’ve also seen other "interesting" issues such as: SymptomsĪs mentioned earlier, there are a range of error codes reported by Windows Update when it cannot service the OS. This can be very useful when trying to correct the issue – more on that trick later. Note that you can directly search for a given update in the Windows Update Catalog, add to basket and then download it. There are many Windows Update failure codes and each has their own root cause. Trying to install the update manually after downloading from the Windows Update Catalog, or using Windows Update would always fail. In may cases, the first indication of a CBS issue was Windows Update failing to install an update. Firstly they saw the perceived size of the C:\Windows\WinSxS folder, and secondly they experienced CBS corruption. Typically though, two things happened to sour an admin on CBS. Yes, that really was a thing.Īfter having to deal with those issues for 15 years, CBS promised much goodness. The act of re-applying the service pack would over write the older file from the CD with the new file from the service pack.
After installing an OS component you had to reapply the service pack. NT had its own quirk where there was no chaining.
Windows knew it needed particular files from a particular source and would prompt as needed. inf files were chained as the OS was updated over time with service packs and hotfixes. For example if you wanted to install an OS feature on a Windows Server 2003 SP2 machine, potentially you needed to provide RTM, SP1 and SP2 source files.
For those who worked on NT or Windows 2000/2003 servers there are always some funny stories around managing the OS over time. The Windows Component Store was introduced in Windows XP to support side by side assemblies and enhanced in Vista track all the OS components.
Note that Windows 7 and Windows Server 2008 R2 changed their update methodology in October 2016 to mirror the update distribution behaviour in newer versions of Windows. When we looked into the details, the monthly Windows Server 2012 R2 updates had been failing to install for the last 18 months. The customer's security team were slightly upset as they believed (mistakenly) that all assets were properly updated. The below post initially stemmed from an Exchange Risk Assessment which noted that all of the customer's Exchange servers were missing critical Windows updates.
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