Once you check to see if SP1 is installed, please do the following:
Make sure that you are booted into an account with Administrative privileges.
- Click on Start orb and type cmd.exe into Start Search field.
- Right click on cmd and choose Run as administrator to open an elevated command prompt.
- Into the elevated command prompt window, type in or copy and paste sfc /scannow and press your Enter key.
- This may take a little bit of time to finish so your patience will be needed.
Once the scan is complete, follow the instructions to access Turn Windows Features On or Off once again found in post #13.
Let me know the results...