Defendpcpro.xyz Uses Fake Virus Scares
Defendpcpro dot xyz is one of the hundreds of similar domains and websites that exist only to mislead and confuse visitors.
This type of page falls into the subcategory of "fake virus warning" misleading websites. This means the page will contain very scary but always very fake warnings regarding your computer.
The severity of those warnings can vary and range from "viruses found" to threats that the user visited an "unsafe site", or even virus warnings displayed inside blue images styled to look like Windows 10 interface dialog boxes.
The fake messages are made to frighten the user and get them to click in a hurry without thinking. Similar pages usually promote browser ads delivered through push notifications or may execute bad redirects to other untrustworthy websites.
Any time you land on any sort of online page that tells you there are security or virus issues with your computer, immediately close that page because it will always be fake and an attempt to scam or mislead you.