Jimmy Downloaded a Game from the Internet and Installed It

Multiple Choice

Jimmy downloaded a game from the Internet and installed it on his Windows 10 system. A couple of days after the installation, his computer's performance degraded drastically. Assuming that the game had slowed it down, he uninstalled the game and used software to get rid of residual files. Despite this, his computer's performance did not improve. Inspecting the Resource Monitor revealed that the Memory and CPU were running close to 100% capacity. He suspects that the computer is infected with malware.
Which of the following scans would you recommend to Jimmy?

A) Real-time scanning
B) A full scan
C) A quick scan
D) A custom scan