
Solution 2: Run the Windows Update Troubleshooter Additionally, the tool is incompatible with Windows 8, 8.1, and Windows 10.

If you are by any chance running this version of Windows OS, click here to download the file and install it on your system. However, this program has been discontinued and it can no longer be found on official Microsoft sites, except for Windows 7 Service Pack 1.

The tool can be used to scan and check your Windows image for errors and inconsistencies. This tool is particularly useful if you want to check whether your system is ready for the following update.

Make sure your follow the instructions below in order to fix this. This is especially valid if the error code is displayed next to the ERROR_SXS_ASSEMBLY_MISSING message. This problem may occur if some of the system files necessary for the update are either missing from your system or if they are corrupt and can’t be accessed. Solution 1: Some of the System Files Are Either Missing or Corrupt
