What is System idle process?

Just as the pictures below, In Windows NT operating systems, the System Idle Process contains one or more kernel threads which run when no other runnable thread can be scheduled on a CPU. In a multiprocessor system, there is one idle thread associated with each CPU core.

What causes system idle process at 99 error?

Hard disk is full.
Too many applications are running at the same time.

How to Fix Problem of system idle process at 99

1. Reinstall the software which might cause windows xp system idle process high cpu usage problems.

2. Update your windows to the latest version. Please watch the video below:

3. Download and install the latest drivers for your computer.

To update the drivers automatically, all you need to do is right-click Computer and choose Manage.

And then click Device Manage. Check carefully and see if there is a yellow exclamatory mark. Double click it and click update drivers.

4. Execute the sfc /scannow command.

System File Checker is a utility in Windows that allows users to scan for corruptions in Windows system files and restore corrupted files. All you need to do is just click Start--Type CMD in the searching box--type sfc /scannow and click enter.

5. Still cannot fix system idle process high error?, then you need to do a system restore for your PC.

Win 8 Restore:

a.From the Windows 8 Start screen, type "Restore." The top result in the right-side Search panel should be "Create a restore point." Even though that's not what we're doing today, that's the choice you want to make. It opens the Control Panel to the Systems Properties dialog's System Protection tab
b. Tap the first button on that property sheet: System Restore. This opens a wizard-like dialog, the first page of which says "Restore system files and settings" Here you get another chance to see which programs will be lost and gained. Tap "Next."
c.you'll see a dialog with a choice of system restore points.

Win 7/vista Restore:


Is your PC healthy?

Computers runs best when they receive regular, professional maintenance. The installation and un-installation of software, hardware, and drivers often leave remnants behind in your registry, resulting in a tangle of unused applications, broken drivers, and incomplete and empty command signals. This mass of confusion slows down your computer and if not addressed promptly can lead to terrible problems such as computer freezing, programs not responding, and system crashes. As a distinguished computer booster, SmartPCFixer is definitely a good option for people to repair system idle process xp issues. Apart from getting rid of system idle process windows 7 errors, this tool also has amazing function for its users.

Please Note:The Windows Registry will be scanned and repaired by SmartPCFixer. This software
will remove damaged registry entries and repair the windows registry. The scan and repair process will take approximately 2 minutes.

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