McAfee on start up takes as much as 90% CPU usage. Have uninstalled and reinstalled. Makes the PC unusable. PC is a Windows 10 Version 1709 HP Intel i5, only about 18 months old. Have disabled Windows Defender. Still doing the same. Anyone know how to fix this?
use a different virus checker - something like avast free there are many other free checkers
Have now found out McAfee promised a patch two weeks ago. Where is it? If a BT moderator is looking at this thread, please advise where you are with McAfee on this.
My advice and that of others on the forum would be to uninstall BT/McAfee antivirus. It can cause problems on some computers and as you have found is a resource hog. Do a search of the forum to see the problems.
You are always just an "update" away from it causing some other problem.
There are far better free antivirus programs available such as Avast Free and AVG Free.
If you do want to uninstall BT/McAfee use this guide and make sure you use the BT/McAfee removal tool after you have restarted your computer.