John notices that his hard disk LED is on, even though he isn't doing anything on the computer and it isn't connected to the Internet. Which of the following could be causing this?

Question

Quizplus · Accepted Answer

A symptom of many viruses is unusual activity on the system disk. This is caused by the virus spreading to other files on your system.
Key Takeaway: A virus infection on the computer may lead to symptoms that include home page redirects, significant slowdowns in data access speeds, bizarre error messages, a huge increase in file space/decrease in free drive space, new icons/folders, etc.

John Notices That His Hard Disk LED Is On, Even