Windows 10: Defender 4.18.1807.18075 is massively broken. High CPU leaks.

It's been broken since 1803 release, but 4.18.1807.18075 is a complete disaster. Locking PC right and left at almost any action. Massive CPU activity even while not scanning anything with no any I/O reads.


There is a long thread on tenforums no word on the issue.

https://www.tenforums.com/performance-maintenance/114874-high-cpu-usage-windows-defender.html

:)

 

WIN10 1703 update cause Explorer.exe high CPU usage

Hi,



Glad you reached out. First, we would like to know if Explorer.exe
is the only cause of high CPU usage. Because the common cause of high CPU usage are the following:

- Windows 10 Memory leak after the update.

- Driver incompatibilities after the update.

- Multiple startup applications

• 
  

We'll be waiting for your update.

 

RAM leaks and high CPU usage

Sorry to seem so negative, folks, but am I the only one who thinks it's disgraceful that the onus seems continually to be on users to fix the ridiculous RAM leaks and high CPU usage problems that were caused by the Fall 2017 Creators Update?

I received the Creators Update for Windows 10 Pro near the end of the year -- not surprisingly, since I'm currently living in eastern Europe. Installation went smoothly, but from the outset, I began experiencing significantly higher RAM and CPU usage. These
were issues that I'd not experienced before. I did a bit of research, and discovered that the errors don't really seem to depend on system hardware or idiosyncratic configurations. Instead, the problems appear to lie clearly with the update itself.

I'm lucky enough to have a very robust system: i7 Haswell-E 5820, factory overclocked and liquid-cooled; 32 GB of RAM; GTX-980; fast SSD as my program drive, etc. I also have a Rainmeter skin that shows me RAM and CPU usage in real time. On boot, I used
to see only about 2.25 GB of RAM being used; CPU would settle to 1-2%. Since the Creators Update, RAM usage on boot is routinely from a low of about 4.25 GB to as much as 7.5 GB, and CPU usage regularly shows prolonged inexplicable intervals of 20 - 35% usage,
and occasionally even more.

I've tried the various suggested measures to alleviate the problems, with minimal (and only temporary) success at best. I've had no success at all in trying to get information directly from Microsoft through Support. It's worth noting that all the various
suggestions to deal with these problems involving taking steps to cripple Windows functionality in order to reduce system overheads, thereby depriving users of some of the very benefits the OS is supposed to provide. Microsoft doesn't seem to be bothered by
that; in fact, it seem quite content to allow users to flounder around in the mess created by the update.

Does anyone have a definitive solution for the RAM leakage and CPU usage problems (short of turning to an alternative OS)? Is there any word as to whether Microsoft will address these problems soon?

Moved from: [Windows / Windows 10 / Windows settings]

 

High cpu usage by dwm.exe

I'm having the same problem. All of the steps listed above did not help. I'm constantly running at least 18% CPU on the desktop window manager with nothing open. My cooling fan is running wide open all of the time.