You may crack the password and login your computer again.
Windows Password Recovery is right what you need in your case. The password recovery tool is designed to reset Windows login password once you accidentally forgot it or have no access to your system including Windows 7, Vista, XP etc. By burning a bootable CD, you can enter almost any computer with Windows administrator login password protected within a few seconds. Here are the step by step tutorial, pretty easy, I am sure you can handle it!
Step 1: Download Windows Password Recovery and install it on another computer.
Step 2: Prepare a blank CD/USB and run the software and use it to burn the ISO file to it.
Step 3: Put it into the CD-ROm and restart your locked computer. Change the BIOS setting of your locked computer to make it boot from the CD-ROM or USB drive. Note: start computer and press F2 or Delete to enter BISO setup
Step 4: Boot your locked computer from the created disk and remove your forgotten password. GOOD LUCK!