Yourdesktopdatasecurity.site Uses Fake Virus Warnings
Yourdesktopdatasecurity dot site is a misleading webpage that pushes fake virus warnings in your face to scare and confuse you, in the hopes of slipping unsolicited ads into your browser in the process.
This sort of site falls into the subcategory of "fake virus warning" misleading pages. The site will show you imagery, doctored to resemble the interfaces and windows of antivirus applications. The images will contain all sorts of scary but also completely fake warnings.
This may be a message that your computer has "five viruses" on it, or that you recently visited an "illegal website". All those warnings are fake and are a simple social engineering trick designed to scare the user into submission. A confused user is more likely to click the "accept" button in the browser interface that the misleading site triggers.
Clicking that button means you will allow the misleading site to send you push notifications. This functionality is used for pushing ads into your browser, and those ads, when coming from misleading pages, are often sourced using rogue advertising networks.
This means the ads may link to questionable content, malicious pages, scams or fake giveaways and potentially unwanted program installer packages.
Remember that no online web page can know if you have viruses on your computer and all those messages will always be fake and misleading, and you will avoid a lot of trouble with rogue ads online.