Opening Task Manager Slows PC to Crawl - Windows 10 Pro 1709

Hi,

Your concern about the performance of your device can be due to the changes in its configuration and/or broken/corrupted system files. Based on the details that you've shared along with your previous posts on this thread, we'd recommend performing an in-place upgrade to overwrite the existing configuration with default operating system (OS) settings as well as to fix system conflicts on your device. To do this, we'd recommend performing the steps posted by Andre Da Costa on this link. As an additional reference, you can also check the post of PaulSey here.

Let us know how it goes after you've performed the steps.

Did you read all the posts here?   Since my initial response to this thread, in which I reported I am having the same issue, I have purchased and set up a new computer.  I already had the problem on my desktop AND laptop.  And as I subsequently posted, I have the issue on my brand new machine as well.  I don't have "changes in its configuration and/or broken/corrupted system files" on my brand new computer; as soon as I had installed all my software, I tried to run Firefox and Task Manager together and it was the same as on my two older computers.  This is not a problem that can be fixed by the user - the solution is up to Microsoft, Mozilla, or both working together.

Webroot looks like the culprit in my case too.

Having set WR to allow taskmgr.exe (https://www.webroot.com/En_US/SecureAnywhere/PC/Content/C5_Quarantine/CH5b_BlockingAllowingFiles.htm),the PC no longer slows to a crawl when Task Manager and Firefox are open.

To see whether the problem relates to the Webroot Filtering Extension in Firefox, I tried enabling it and disabling it. Didn't affect performance with TM open, so I assume that 'allowing' TM in Webroot is the step that matters.

I'll try Chrome later and report whether the WR fix holds good for it as well.

Unfortunately this didn't help when I tried it.  Took about 3 minutes to regain control of my computer (2 Xeon Processors, 48g RAM, 1T SSD) when I tried opening Task Manager while Firefox was running after allowing Task Manager in Webroot.

Webroot looks like the culprit in my case too.

Having set WR to allow taskmgr.exe (https://www.webroot.com/En_US/SecureAnywhere/PC/Content/C5_Quarantine/CH5b_BlockingAllowingFiles.htm),the PC no longer slows to a crawl when Task Manager and Firefox are open.

To see whether the problem relates to the Webroot Filtering Extension in Firefox, I tried enabling it and disabling it. Didn't affect performance with TM open, so I assume that 'allowing' TM in Webroot is the step that matters.

I'll try Chrome later and report whether the WR fix holds good for it as well.

Ah, so it is a Task Manager issue perhaps more than a Chrome or Firefox issue. Perhaps those browsers trigger something weird that Task Manager can't quite handle?

Are you using Webroot antivirus? My computer has the same issue and it started the day after I installed. They claim the issue is firefox quantum, however it doesn't explain why headless chrome is doing the same thing.

I work in IT. This problem is present on a lot of PCs with the Fall Creator's update, regardless of the presence of Fx. Opening task manager KILLS Windows.

Need a fix ASAP.