A user reports that their computer is running very slowly and frequently crashes. They have not installed any new software recently. Which of the following is the MOST likely cause and first step in troubleshooting?
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A
The hard drive is full, and the user should run a disk cleanup utility.
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B
The operating system is outdated and needs to be reinstalled immediately.
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C
A critical hardware component like the CPU has failed.
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D
The computer has a virus, and a full system scan should be performed.