The following actions are the effects of virus infection in a system except

Virus infections can cause various harmful effects on a computer system, but among the given options, the action that is not an effect of virus infection is hard disk failure. A virus is a malicious software program that can infect a computer system, replicate itself and spread to other systems. Once a virus infects a system, it can cause various problems such as deleting files, slowing down the system's operation, and displaying unwanted messages. Deletion of files: A virus can delete important files or programs on a system, making it difficult or impossible to use certain applications or access certain data. Slow operation: A virus can consume a significant amount of a system's resources, which can cause the computer to operate slowly and inefficiently. This can cause frustration and hinder productivity. Display of unwanted messages: A virus can display pop-up messages or advertisements that are unwanted and can be distracting or harmful. These messages may also try to trick the user into downloading more harmful software. Hard disk failure: While a virus can cause data loss and corruption, it is not typically the direct cause of hard disk failure. Hard disk failure is usually due to physical damage or wear and tear over time. In summary, a virus infection can cause several negative effects on a computer system, including file deletion, slow operation, and display of unwanted messages. However, hard disk failure is not typically caused by a virus.