Know More about 1-855-653-4481 Fake System Alert Popup
Once you are seeing bsod popup warning your computer has been locked or infected due to unexpected error and asking you call a given number to the problem, you might have adware or potentially unwanted programs in your computer. This often happens after you download and install some software that bundles with other unwanted programs to your computer.
Here is a screenshot of 1-855-653-4481 fake system alert popup:

