Check for possible software updates, my reasoning for that is the computer could be trying to initiate an update but is stopped by the user if you don't want it to update go to settings and turn off auto update
Answer:
SQL Injection
Explanation:
Coding a web application that uses a database is requiring close attention, where the developer closes any loophole any attacker may later want to exploit when the application is deployed. SQL Injection is a type of attack where the attacker places malicious code in the query statements through the form. This is possible if the input is not properly sanitized and cleaned.
Refraction represents a change in the direction of propagation when beams of light encounter a medium with a different density.
Reflection is the return of light to the medium it came from when it encounters a mirror.