Hi, why don't remove the password with windows password Recovery tool 3.0.
If you can not remember the windows admin password, try to reset it with a reset disk. Free download windows password Recovery from http://www.windowspasswordsrecovery.com and there is a .iso file included. Burn the .ISO file onto a blank CD which is so-called windows password Recovery disk. With this disk, you can reset the unknown password without erasing anything