Everyone should remember once and for all times: if your operating system shows a pop-up/alert/warning and tells you to buy something, it’s not your operating system doing this, it’s a computer parasite.
CrisysTecSentry is one of those mentioned above. Many computer parasites use this tactics as they install on a computer secretly and then prompt you to buy something. This ‘business plan’ is so freak, however many people step into this trap before they understand what it is.
CrisysTecSentry can get on a computer through several browser security holes or it can be installed by trojans. If you notice any pop-ups related to CrisysTecSentry, run anti spyware scan immediately.

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