If your browser is redirected to http://www.sys-online-securities.info that says “Your microsoft computer has been blocked” then most probably your PC is infected with an adware. This “Your microsoft computer has been blocked” warning is a complete fake, simply ignore it.
I suggests you use AdwCleaner, JRT and Malwarebytes Anti-malware to clean your computer. As your first step, open Control Panel, then Uninstall a program, then scroll down through all list and remove all unknown applications. Next, scan your computer with AdwCleaner, JRT and Malwarebytes Anti-malware and allow to remove all that it found. On the latest step, reset your browser’s settings to default.
Links:
AdwCleaner http://www.myantispyware.com/download/adwcleaner
JRT http://www.myantispyware.com/download/jrt
Malwarebytes Anti-malware http://www.myantispyware.com/download/malwarebytes-anti-malware
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