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minsc
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Message 1 of 17

mcuihost.exe stopped working

I'm using McAfee Internet Security Unlimited Devices on a Windows 7 laptop.

Whenever I open the main interface, and go to 'Account' then 'About' to show the status of the components installed (version and dat file numbers), all is fine. Until I close that window! Every single time a few seconds after it closes I get 'Windows Problem Reporting' asking for access through the firewall and this error in Reliability Monitor:-

fault.png

I see that mcuihost.exe is causing an error in the ntdll.dll dynamic link library, a file that was updated to a new version last Patch Tuesday by Microsoft. The problem started immediately after the last PT, which leads me to believe mcuihost.exe isn't working properly with the current version of ntdll.dll.

Along with these 2 other issues I have with the current version of McAfee:-

No up/down buttons making scrolling very jerky

And McUICnt.exe flipping out at random and making the UI unresponsive and high cpu usage

McAfee is making my machine miserable to use.........

16 Replies
Reliable Contributor catdaddy
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Message 2 of 17

Re: mcuihost.exe stopped working

You can try running the McAfee Virtual Technician and see if it finds any problems and attempts to fix them. Or follow these instructions Uninstall McAfee security software

Cliff
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minsc
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Message 3 of 17

Re: mcuihost.exe stopped working

Looks to me as if mcuihost.exe is having an issue with the new version of ntdll.dll that was installed as part of October's patch tuesday, and causing an error on exit, as my issue started the day after I installed October's PT.

Most people will have Windows Problem Reporting allowed access through the firewall, so wont know if a program stops working.

CD, open Account->About, close it, then check your Action Center->Reliability Monitor to see if you're getting the same issue as I am, as you may not have noticed..........

Reliable Contributor catdaddy
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Message 4 of 17

Re: mcuihost.exe stopped working

Hmmm..As a matter of fact it seems it shows I did on 11/9/2017. No other instance since,and never have experienced any issues?

Cliff
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Message 5 of 17

Re: mcuihost.exe stopped working

If a program or component stops working, then sometimes it takes a while for it to show up in Reliability Monitor, so if there's an issue after opening and closing your McAfee 'About' window, then it might not show up right away.

Do some opening and closing of Account->About today and see if it shows up in Reliability Monitor. Every time I do so, it causes the fault I have highlighted in the attached picture above. So your Reliability Monitor graph will be slayed!

If you're getting the same thing, then there's an issue with the way mcuihost.exe is interacting with the latest version of ntd.dll that needs to be reported to the devs.......

Also note my dates are in the British form so day/month/year

Reliable Contributor catdaddy
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Message 6 of 17

Re: mcuihost.exe stopped working

Again my software has functioned flawlessly. However I will bring this up for conversation on Monday.

Cliff
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minsc
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Message 7 of 17

Re: mcuihost.exe stopped working

catdaddy wrote:

Again my software has functioned flawlessly. However I will bring this up for conversation on Monday.

Probably only worthwhile if others are seeing it. If it's just me, then it's probably an issue on my machine only.

Reliable Contributor catdaddy
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Message 8 of 17

Re: mcuihost.exe stopped working

I have indeed brought it up for tomorrow. I can ask the Senior 3.0 Techs to ask the Front Line Customer support if they have been getting any calls relating to this issue. I will get back to you after the Meeting.

Cliff
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Reliable Contributor exbrit
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Message 9 of 17

Re: mcuihost.exe stopped working

This is what I was seeing a while back and MVT reports nothing wrong now.  It's been a few days and nothing so maybe an update fixed whatever it was

Reliable Contributor exbrit
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Message 10 of 17

Re: mcuihost.exe stopped working

I stand corrected, it happened again just now when I closed the "About" window.

I suspect latency when closing windows could be the cause.

MVT reports no problems.  MSC 16.5.188 Windows 7 SP1 x64 fully updated.

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