What would you suspect when the hard drive access light turns on and off with no applications running?

Answer

The hard drive access light turns on and off when accessed by applications and other processes. You may not have any applications running, but the operating system (such as Windows) on your hard drive may be running something. The operating system may access the hard drive periodically. Backups and virus checks are constantly occurring. Updates are made automatically many times, and may access your hard drive. It is normal for the hard drive access light to turn on and off, even if you do not have applications running.
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