PC Problems can be caused by a variety of issues, such as viruses, crashes, IERRORs, RottenApples, SlippedDisks, and ShortTermMemory. Viruses are malicious software that can damage or disable computers, while crashes occur when a computer stops responding due to an unexpected error. IERRORs are errors that occur when a program is unable to execute a command. RottenApples are malicious programs that can be used to gain access to a computer system without authorization. SlippedDisks are errors that occur when a disk drive fails to read data correctly. Finally, ShortTermMemory problems occur when a computer's RAM is unable to store data for long periods of time.