The Windows 10 mail app has not been working on my SB. Now the camera isn't working. I ran the command (SFC \scannow) to repair corupt files in the logs it says the file C:\windows\SYSWOW64\opencl.dll can't be repaired. I attempted copying on from another machine and it didn't work. I found a fix which I will try tonight. To fix this problem, you need to have the ISO of the exact build you have installed. Mount the ISO image. Create a temporary directory to mount the Windows Image File (WIM). mkdir C:\WIM Mount the WIM file. Dism /Mount-Wim /WimFile:\sources\install.wim /index:1 /MountDir:C:\WIM /ReadOnly Run Dism with the following parameters. Dism /Online /Cleanup-Image /RestoreHealth /Source:C:\WIM\Windows /LimitAccess When done, unmount the image and delete the folder Dism /Unmount-Wim /MountDir:C:\WIM /Discard rmdir C:\WIM It's mandatory to restart your computer, or SFC and DISM will still show errors. That should fix the issue.