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A personal computer that resides in one location with its core components inside a case separate to third-party peripherals required for operation, such as a mouse, keyboard, and monitor.

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CPU fan rattling and computer is laggy and choppy

So as I do every 2 months is clean the inside of my computer tower and today after I finished cleaning, I turned on my computer to make sure everything was working. I immediately noticed the rattling coming from the CPU fan and bios gave me an alert about the cpu reaching 190+ Fahrenheit so I turned off the pc again immediately to cool it off, after a while I turned it back on and everything is laggy, my cpu is at average temperature I can still hear the fan rattling but it’s running so I figured it would still be doing it’s job cooling it down. And I know it can’t just be the fan that’s messed up, simply left click and drag on the desktop highlight is laggy, does anyone have any clue to what’s happening? Is my cpu just half way there now?

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If the software is running normal then the CPU may have gotten hot enough to be damaged. It depends on how quickly you shut down and how long the CPU was at 190+ if there is damage. I would suspect a DLL or other file to be using up CPU time and causing the lag. This could happen if you shut the computer down manually instead of the OS shutting it down.

You should replace the fan as it is not going to get better. You should also clean and reapply thermal grease to the heatsink and CPU. You did not specify an OS, but for Windows you can use Task Manager to see which routines are running, you can also use Resource Monitor to find out if there is an application or DLL that is causing the lag.

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