After you bring up the Extensions Manager, there will be a setting in the upper right hand corner that will look something like this:

"Custom" is what it will say more often than not, but the the other possibilities are:

1. All on
2. All off
3. 7.5 Only (or "System 7.5.3" or "System 7.5.5")
4. A set saved under a specific name (which can be anything)

If the set is set to "Custom",

1. Click on the word "Custom"
2. Choose "Save Set..." from the list of options. You will see a window like this:
   

3. Name the set "Original"
4. Click on "OK." Now you should see:

   

5. Click where it now says "Original" and choose "7.5 Only" (or "System 7.5.3" or "System 7.5.5"-- whichever is there)

If it is set to anything else, simply click on the set name (whatever it is) and choose "7.5 Only" (or "System 7.5.3" or "System 7.5.5")

Now for the final bit. If an Apple modem (Express Modem, GeoPort, or Global Village modem) is being used, its drivers need to be reactivated. Use the following table to determine what gets activated:

Now, close the Extensions Manager. If it gives any messages about "Duplicates existing in the target folder", it alright to overwrite them. It's also possible that an Error of Type -15277 may appear. Get that squared away (click on that link to find out how) and Restart the computer!! >