I'm not sure if this is your solution but you can try a few of the NirSoft Password Recovery Utilities.
http://www.nirsoft.net/
NirSoft and Sysinternals have some other useful utilities worth checking out. Network monitoring and a key logger program might help.
My son let one of those computer fixers that ring up into my laptop. They then told him after 2 hours that he had to pay $99 which he said he wouldn't. They have password locked the laptop. I have bought and run the windows password recovery program, it resets all of them except the one that has been put on by those people. One of the ones that can't change was called support_388945a0. What can I do to get around this problem.

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