Final answer:
The software that falsely claims your computer is infected to make you buy a solution is called scareware. It's a scam tactic to deceive users into purchasing unnecessary or harmful software.
Step-by-step explanation:
Software that pretends your computer is infected with a virus to entice you into spending money on a solution is known as scareware. Scareware is a type of malicious software that is designed to trick users into believing that their computer system has a serious security issue such as a virus or that they need to download and pay for antivirus software that is, in fact, non-functional or malware in itself. This is a common online scam tactic and it's important to have legitimate antivirus software installed on your computer from a reputable company to avoid falling victim to such scams.