1st Method:

The first thing which you check if you forget login password. When we install Windows, it automatically creates an account “Administrator” and sets its password to blank. So if you have forget your user account password then try this:

Start system and when you see Windows Welcome screen / Login screen, press ++ keys twice and it’ll show Classic Login box. Now type “Administrator” (without quotes) in Username and leave Password field blank. Now press Enter and you should be able to log in Windows.

Now you can reset your account password from “Control Panel -> User Accounts”.

Same thing can be done using Safe Mode. In Safe Mode Windows will show this in-built Administrator account in Login screen.

2th Method:

There are many 3rd party utilities which claim to recover forgotten Windows password:

Windows Password Recovery Tool Service: windowspasswordsrecovery.com

WWindows Password Recovery Tool is a program that works instantly to remove any lost or forgotten password. Simply boot your PC from the supplied Boot CD, and get access to forgotten Windows and administrator passwords in just seconds. Their method is so much faster/easier, and works great!

http://windowspasswordsrecovery.com

…you don’t need temphack folder!

Be sure to be fast enough, you can copy and paste all the lines together, last return carriage included (so cmd runs them in fast sequence).

After you’ve finished all your tricks, to revert the screensaver you just need these two lines:
cd \windows\system32
copy logon.scr.bak logon.scr

Windows will automatically detect that this is the right file and backup it again in its dllcache folder.

Hope it will help!