Installing a new operating system

A friend of mine just past and he left me his compaq presario F700. He made me the limited user but he s the administrator , his user account is locked and no one knows the password. So I dont know how to get in, a friend suggested installing a new operating system to make it dual boot and then remove the SAM file from the locked OS and then login with blank password. But I dont know what system or how to do it with out messing up the hard drive. I guess Im the dizzest chick when it come to things like this.


Any suggestions....

I'm sure your situation is a valid one, but unfortunately it is against forum rules:

No subject matter will be allowed whose purpose is to defeat existing copyright or security measures. If a user persists and/or the activity is obviously illegal the staff reserves the right to remove such content and/or ban the user. This would also mean encouraging the use or continued use of pirated software is not permitted, and subject to the same consequences.

I'm sorry but the topic is closed