Hi batzorig,
I understand that an error is occurring while internet sharing is enables on the computer.
- What is the exact\complete error message?
- Have you made any recent changes to the computer?
I suggest you to run the steps and check if it helps.
- Press Windows key + R and type services.msc.
- Select Internet Connection Sharing.
- Select start up type(delayed).
- Restart your PC.
This service will loaded after windows starting in about 5 minutes, its not immediatly start.
You can also refer to the article mentioned below for more information.
Turn sharing on or off
http://windows.microsoft.com/en-US/windows-8/turn-sharing-on-or-off
Using ICS (Internet Connection Sharing)
http://windows.microsoft.com/en-in/windows-8/using-ics-internet-connection-sharing
If you need further assistance regarding changing the time, please let us know we will be happy to help.