try this trick: Login with the default administrator account Step 1: Start Windows PC Step 2: When you can see the Windows login screen, press ctrl+alt+del keys Twice and it'll show Classic Login box Step 3: Type Administrator as Username and leave the Password field blank Step 4: Press the Enter Key and then you can be able to login the default windows administrator account which is it created by default when install windows. Note: When you input the key combination Please don't put the cursor on any account. And if you change the name or password before, you cannot login by this way. so only windows password recovery utility can help you,check this out:
Answer to: How can I retrieve the password