why does cpu usage go to 100

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The average Windows PC is permanently busy, constantly juggling system resources between the 50 or more processes it\’s running at any one time. Sometimes, for no apparent reason, a rogue application will demand all your processor\’s attention, and before you know it the process is running your processor at 100% all of the time. This will feel like a major disaster, especially if you\’ve unsaved work in other applications. They will be very unresponsive, it\’ll be difficult to switch to them, and even if you manage it then little will seem to happen. Just redrawing the screen may take an age. So your first step should be to try and regain control over your system, reducing the impact of the resource-hogging app and allowing access to other programs again. CHECK TASKS: Task Manager will quickly highlight the resource-grabbing application Press Ctrl+Shift+Esc to launch Task Manager, then, click the Processes tab and choose \”Show processes from all users\”.

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You should now see everything running on your PC at the moment. Then click the CPU column header to sort by CPU usage, and look for the process that\’s the most demanding. (No CPU column? Click View Select Columns, check the \”CPU Usage\” box and click OK. )
Once you\’ve discovered the offending process, right-click it and select Set Priority Low. This tells Windows that just about everything else you\’re running is more deserving of CPU attention, and may make a very small difference in system responsiveness. Now right-click the process again, select Set Affinity, and clear all but one of the CPU boxes. The \”Processor Affinity\” setting tells Windows which CPU cores are allowed to run a particular application, and so by restricting it to one you\’ll free up the others for the rest of your programs.

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BRING IT ROUND: Blocking your rogue process from all but one CPU will quickly bring it into line The results should be visible immediately, with CPU usage dropping and other programs becoming usable again. Switch to any applications that contain unsaved work, or that you need to be sure are closed properly (your email client, say), save any documents and close them down. And then close everything else non-essential, to simplify your system: all running applications, any system tray icons that are surplus to requirements, the lot. PLEASE TRY THIS IF OTHER METHOD FAILED. Often I too HAD 100%CPU usage problem in my windows 7 Laptop. Though I close all programs before shutting down, there used to be a message waiting to close down the programs that is running.

Thank God it is SOLVED NOW. I believe that he only helped me to solve it. No other experts could help me nor am I an expert. I don\’t say that the problem faced by you is also like mine because this Problem can be due to other reasons as well. But you may try this metod. Any way this is a very safe method also. But this applies only for laptop etc: and not for desktop. After shutting down the laptop remove the battery and charger plug. Then press start button just like for switching on the laptop and hold the button for 10-15 seconds. Computer will not start as there is no power but it can remove the problem (This is just like removing the battery in mobiles when it hangs etc: ) After that again place the battery back and start it as usual. This helped me. Now it is fine. May God help you.

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