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I had a problem with Java Platform SE binary, so I googled a tutorial to solve my problem. The steps in this tutorial were as follows: - do the Win + R key combination; - type in the box msconfig, thus arriving at the system configuration; - Click Services tab and then check Hide all Microsoft services. I have very probably forgotten this step; - Click Disable all, click Apply to save the changes. After clicking Apply my laptop is restarted, and I'm has been unable to access it since. Every time I try to log in to my laptop I get the following message "There is a problem and your PIN is not available. Click to reconfigure the PIN"; when I click on "Click to reconfigure the PIN" nothing happens. I tried restarting the laptop, but that didn't help.