I think I made a big mistake. I have an old laptop from work that use to be on a network. I was able to use it at home by clicking on the "workstation only". However, I decided I didn't what to do that so I went to properties of "my Computer" and clicked on Network Identification. I clicked Network ID which open a new window. I clicked on "This computer is for home use and is not part of a business network" I rebooted and now I can not logon to the computer. Why doesn't my username and password work now? How can I get back on to the computer? Thanks in advance.

Try to fix it in safe mode. Please send a reply, if you solved the problem !!!

I tried in safe mode, but it is still requires a username and password. My info, which use to work, now does not. What did I do wrong?