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Erratic typing in Windows 10 (Firewall problem?)

I'm a new user in these forums and I don't know where I should place this question so I hope General Discussion is a good starting point.

Dell Inspiron 15 - 5559 i5-6200U 2.30GHz 8GB RAM Intel graphics. Windows 10 Home Creators Edition v 1703 and Feature Update V 1709.

I encountered this problem about 2 months ago. Typing is very slow in Internet Explorer, Edge and also Cortana seach box. Typing text into URL address bar of IE11, Edge, Cortana or Google (in IE11 or Edge) was OK for the first few characters but then I had to wait for text to be echoed to screen. Problem not present in Firefox. Problem observed after McAfee Internet Security update v 16.0.4 was applied on October 8, 2017. The previous version of McAfee had been working fine on Windows 10 V 1703. Sorry but I don't have a record of the earlier version. The problem continued after the Windows 10 V 1709 feature update.

Turning off the McAfee firewall fixes the problem! MVT shows mfefire service is not running but can't fix it. I've removed McAfee. Used MCPR.exe and then reinstalled but the problem reappeared.

Windows eventlog shows hundreds of errors: The server {7966B4D8-4FDC-4126-A10B-39A3209AD251} did not register with DCOM within the required timeout.

Could this be the problem? Is this problem related to the Windows 10 Explotation Prevention feature because I came across a Microsoft forum in which the following article was mentioned:


I have had to remove McAfee for now and am relying on Microsoft Security Essentials until a McAfee fix.

Any advice would be appreciated.

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