1.    02 Jun 2017 #1
    Join Date : May 2016
    Posts : 4
    Windows 10 Home 64-bit

    Explorer freezes/high CPU when opening some folders, but only once


    I've had this problem since I installed the Windows 10 Creators Update (but it has persisted even though I uninstalled it).

    Sometimes, when I open a folder in Explorer, it does not display anything inside (just white; no icons nor file names). Then the CPU usage spikes and I have to force-restart Explorer (it never actually crashes, but it also never eventually displays anything — I've waited). However, if I open the same folder again after restarting Explorer, the files and icons display fine and the problem never reoccurs in that folder. But it might occur later in another folder.

    I initially suspected Mystic Thumbs, which is a little utility that creates preview icons for Adobe files (*.ai, *.psd, etc.). But now I'm not sure. I ran Process Monitor while the freeze was happening, and it showed this in the stack trace:

    Click image for larger version. 

Name:	CPU.PNG 
Views:	5 
Size:	59.1 KB 
ID:	137742

    Over 90% of the processor's time was spent on something related to IconCacheCreate and/or GetDpiForMonitor... but Mystic Thumbs is not specifically implicated (I actually see no entries in the entire stack related to Mystic Thumbs), so maybe it's something else. The event associated with the very bottom trace in this list is a NotifyChangeDirectory operation. I cleared the Windows icon caches, but the problem still happens. It's hard to reproduce, though, since it never seems to happen in the same folder twice (and not in 90% of folders anyway). How do I troubleshoot this?

    UPDATE: I did another Process Monitor trace while I was quickly browsing through folders but where the error didn't occur. The stack trace looked much the same: about 95% of the time on the same processes. So the info I provided may be a false lead... that may just be what explorer does when you're quickly browsing through folders.
    Last edited by PeterR; 02 Jun 2017 at 19:09.
      My ComputerSystem Spec
  2.    03 Jun 2017 #2
    Join Date : Jan 2015
    UK, Midlands
    Posts : 10,955
    Win 10 Pro (1703)

    Hi, try two basic steps. If you can find a state where this problem doesn't occur, you're part way on the journey to identifying the cause by elimination.

    Do you experience this problem if you:
    1. Boot to safe mode
    2. Do a clean boot?
    3. If you don't have this problem in (1) but do in (2) try disabling all context menu or GUI additions.
    E.g. using Shellexview, ShellmenuView (free), making sure not to disable any MS extensions.
      My ComputerSystem Spec

 


Similar Threads
Thread Forum
Solved Thumbnails disappear in File Explorer, then Explorer freezes
Hello, I noticed yesterday that after using File Explorer for a short while, it stops showing any thumbnails, and only shows a plain white icon, not even the default icon for a file type. I tried all the usual methods for showing thumbnails, but...
General Support
High CPU Usage (& fan noise) Drop Drastically on Opening Task Manager
I am using Windows 10 in ASUS ZenBook UX305. The fan of my laptop runs quite loud in general but it drops down drastically every time I open the task manager. The sudden drop in CPU usage can be seen immediately after opening the task manager. I...
Performance & Maintenance
Windows explorer using 20-50% cpu after opening folders with music
When I open a folder with music and wait a couple of seconds windows explorer will use up a lot of cpu and not respond until I restart in the task manager. This fixes it until I open a music folder again which repeats the process.
Software and Apps
Windows Explorer freezes when opening and after every file change
Some time yesterday my PC began acting strangely. Every time I open Explorer, I see "Working on it..." and have to wait several seconds before I can do anything. In addition, any changes to the file structure (deleting files, copying, moving, etc.)...
Performance & Maintenance
Folders not opening
Hi, 3 days ago I was exploring an older hard drive. When I tried to explore the desktop folder of that drive Windows Vista, it wouldn't open. It suggested that i shared the folder so I could explore it or copy files from that folder(which is what I...
General Support
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 05:46.
Find Us
Twitter Facebook Google+ Ten Forums iOS App Ten Forums Android App



Windows 10 Forums