Q&A for How to Add and Delete Users Accounts With Command Prompt in Windows

If you are referring to the BIOS password then you need to reset the CMOS. You should be able to find that by searching how to reset the BIOS on whatever model laptop you have. Otherwise, if you are talking about a local administrator, you can boot to a live CD such as OPH Crack and find out what the password is.

You need to have administrator rights to execute this command. You need to run the command prompt as administrator.

Check your spelling and formatting. Command Prompt is very sensitive to both of these factors, so making a single error (e.g., missing a space or leaving a parenthesis in) will result in a syntax error.

Yes, using this on your own account would delete everything on it. For this reason, you should avoid using this tool to delete any accounts that aren't temporary.