I have forgot my password

I have forgot my password(administrator) in windows operating system.
I have also an guest account.
Is there any solution to find out my main password ?
Is possible , please write me soon.

Topic has moved from Software to Ask for Help section.

You didn't specify whether you have forgotten your user password or not. I'm being confused at this point that whether you are talking about the main administrative password that we give while installing windows, or the password that is required while logging in.
If it is the second case, then you can do this.
1. press the restart button
2. press f8 before windows starts.
3. select "Safe Mode" from the list that appears. press enter.
4. After windows starts in safe mode, go to control panel and change/remove your passwords from the user accounts.

Alternatively, boot windows normally. When you are asked for password, press "alt+ctrl+delete" twice.
you will be shown a window. just type "administrator" in the username box. and press enter.

If you have forgotten the password that you have given while installing windows, then i'm helpless.