Like most of us, I have more than one computer at home and I like to be able to access each system's hard drives from any other computer.  Well, my one laptop just wouldn't let that happen.  It kept giving me an error stating that tjere is a "Logon Failure: user access restriction".  I found this link that told me exactly what I needed to do:

1. Log in as an Administrator
2. Open Control Panel
3. Open Administrative Tools
4. Open Local Security Policy
5. Navigate to Local Policies > Security Options
6. Disable the option for "Accounts: Limit local account use of blank passwords to console logon only"

After following these steps, I was able to succesfully access the hard drive from any other computer.  I must have turned it on by accident when I was messing around in the policies.