My mistake, it looks as if I left out a step.
Go back and run msconfig.
Click on the Startup tab (it's the last tab).
Look in the column titled Command for a mention of those files.
Note: In order to see the entire contents of that line place your
cursor over the bar that's to the right of "Command" and double
click when it changes to a double arrow.
If you find entries for these files remove the check mark from
the box next to them.
Click on Apply and then Close.
Click on the button to restart your computer.
Once your machine reboots, you're going to see a box mentioning
how Windows is now running in Diagnostic Mode.
Put a check in the box so that you don't see the message again
and click OK.
Post back if you're unsure what steps to take. If you find an
entry that you're not sure about removing include all the info in
the Command column for that entry.
As long as your only making changes on the Startup tab, you
won't, as you put it, "mess things up badly".