This is a extremely common pop-up that will occur if you go to an infected website. NEVER call the phone number in the pop-up. The phone number will take you to a company who will tell you your system is infected and they will try to scam you out of money. NEVER call these numbers or let anyone you do not personally know connect to your computer remotely. 

Never Call The Number On Your Screen If You Hear This Message

TEKEASE is headquartered in Peoria, IL. TEKEASE is a premier technology solutions provider with a focus on serving residential clients and small to medium-sized business. We pride ourselves in being At the Intersection of Business and Technology™ by providing affordable solutions which align with our clients business purpose. Through a consultative approach we deliver complete, yet simplified and converged systems and solutions. The TEKEASE staff works closely with our clients to create new business systems environments designed to maximize the efficiency and productivity of the technology. 