I'm using Windows 8.1 ProWMC x64. I'm having a valid RETAIL license. 2 days back I had formatted my system and reinstalled everything. After installation, I've installed all updates shown on Windows Updates except one KB2904440. When I try to install, I'm getting error code 8007371B I've googled for this and got info to run the following DISM commands in an elevated command prompt. DISM.exe /Online /Cleanup-image /Scanhealth DISM.exe /Online /Cleanup-image /Restorehealth Among two, first command is completed successfully; but second command fails and shows the following error description: Code: The restore operation failed. Either the repair source was not found or the component store cannot be repaired. Error: 0x800f081f DISM failed. No operation was performed. For more information, review the log file. The DISM log file can be found at C:\WINDOWS\Logs\DISM\dism.log Googling didn't help in this regard. Can somebody help me to get rid out of this?