Windows 10: explorer.exe constantly uses CPU

explorer.exe constantly uses CPU, once restarted explorer it recover for a while but after few time it happens again.process explorer thread: shcore.dll!ordinal172+0x100 eats CPU constantly and the I/O other is unusualchkdsk performed but nothing changedsorry for bad english, any help is appreciate

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Windows Explorer using high CPU.

Windows explorer is constantly using over 15% cpu for whatever reason and total cpu utilisation is up at 17% at idle . I've tried everything: uninstalling AVG (Which was using similar cpu at the same time), deleting all shortcuts on the desktop, using the
chkdsk commands, running msconfig and disabling all non microsoft programs on startup. After doing the last one i noticed the cpu utilization was down to 0-2% at idle. Explorer then shot up the task mananger processes list and took first place in cpu usage.
If i change tabs to the details section in task manager, the amount of physical memory in use by the program at the moment is 512,000K and keeps rising (I dont know if thats supposed to happen). I have an Intel i-7 8750H, 16 gb of RAM and a RTX 2060. (yes
this is a laptop)

 

CPU constantly at 100%

Being as stubborn as I am for Windows 7, I waited until the last possible second to upgrade to Windows 10. Now that I've upgraded, my CPU is constantly at or near 100% mainly by two processes listed as System and System Interrupts, both running 20-30% each. I looked around and most people say these shouldn't be more than 5-10%.

Before you start suggesting the obvious like checking for updates, flashing BIOS, upgrading drivers, editing Registry, using Process Explorer, going into device manager, checking background apps, using the built in troubleshooters, formatting, erasing previous Win installations, etc. Let me just say, that I've tried all of those and none of them seemed to work. I can get the CPU down to about 50-60% but that still seems like quite a lot for a freshly booted up PC just sitting on standby.

At this point, I'm looking for any suggestions at all. My best guess is that maybe my laptops just too old? I've had it for close to 5-6 years or so and I never replaced any of the parts, so it may just be that it's just getting harder to run modern OS? I don't know. If there's any other options, I'd love to hear them before I start looking into replacements.

 

CPU Constantly at 100% In Task Manager, But Not in Process Explorer

Starting yesterday, I have a very odd problem on my Windows 10 desktop-- my CPU is constantly running at 100% (according to Task Manager), and it isn't throttling down. Because of this, it's constantly running at 3.3 GHz and the temperatures are rising to the point where the fans kick in at full force. If I go into the Windows power settings screen and manually change the processor power maximum to 50%, then it's capped at 50% frequency (~1.5 GHz), but it never goes below the maximum possible frequency.

The weird thing is, when I look at the process list, there isn't really anything obvious that's triggering it. None of the processes are abnormal, and though the process CPU percentages do add up to 100%, it doesn't make sense to me that each individual process is taking up as much CPU as Task Manager says it is. Everything seems to be "using" a significantly higher amount of CPU resources than it normally does.

As an attempt to diagnose the problem, I've also tried using Process Explorer. The really weird thing is that Process Explorer shows only 1-2% usage when idle, with the System Idle Process taking up the remaining ~98% as I would expect. Again, nothing looks out of the ordinary in the process list, but the processes are showing the levels of activity I would expect in Process Explorer.

I've already run both Windows Defender and Malware Bytes (a virus was my first guess), but nothing has turned up yet.

This same issue also occurs in Safe Mode, so I'm guessing that it's more along the lines of something to do with Windows itself...

So, to recap:

• Windows 10 Desktop
  
• Intel 970, 3.3 GHz, 6 cores
  
• Task manager and resource monitor graphs shows 100% usage total
  
• No individual process is taking up significant resources in the resource monitor list
  
• CPU is not throttling down automatically based on the dynamic load, causing high temperatures and the fan to kick in
  
• Process Explorer is only showing 1-2% CPU usage
  

Before I go uninstalling everything, how would I figure out what's causing the issue if nothing weird is showing up in Task Manager or Process Explorer?