Question:
I'm receiving an Error messages stating that I'm unable to obtain Won Authentication.

Answer:
A authentication server is to blame for this error as Sierra says. What you need to to is try again in a few minutes.

Question:
When attempting to download an update through the Autoupdate program it reports the following: "Your connection the the Internet is invalid. Please check your settings, and try again."

Answer:
This error simply means that the FTP servers are currently full and cannot be accessed at this time. Try again later or try downloading the update files from here.

Question:
How do I access the console in a single player game of Half Life?

Answer:
You can access the game console with the tilde (~) key. If that does not work, do the following:
1. Right-click in the middle of the desktop and choose New then Shortcut.
2. Click on Browse.
3. Choose the C: drive for Look In at the top of that window.
4. Double-click on the Sierra folder and then on the Half-life folder.
5. Then double-click on the hl.exe or hl file listed there (it will appear with the Half-life logo icon).
6. Click on the Next button and type Halflife Console.
7. Click Finish.
8. Right-click on the Halflife Console icon that is now on the desktop and choose Properties.
9. In the Shortcut tab at the end of the Target file add -console (it should read "C:\Sierra\Halflife\hl.exe -console"
10. Click Ok and use this icon to launch Half-life with the console enabled.

Now you can use the "~" to access the console as needed.