Get rid of McAfee! It uses SOOOOOOO much memory on 'start up' forces itself into every aspect of your browsing. Uninstall it ASAP.
Windows Defender is built in and works 10 times better than McAfee.
If you install this FREE program, then win 10 becomes easy to use and navigate. I install this on all of my customers computers for free of course
This program is fantastic for win 8 and 8.1 also!
After you install this program, click on the 'start' tab in the lower left and then in the box that says: "Search programs and files," type this in; "msconfig." Click on 'BOOT' and Change the boot time from 30 to 3 seconds, then click on 'Services,' then click 'hide all Microsoft services' and then look at every program or service there and 'un-click,' what you don't want. Then go to 'Startup,' and click on 'open task manager,' and this will show you a list of all programs that 'start,' every time you boot your computer. Note that in 'startup impact,' the memory usage is shown. Right click and choose disable any program that uses excessive memory, especially the programs that you don't normally use. In all instances after you make changes click on 'apply' at the bottom. Close the msconfig program and reboot and see if things run smoother and faster.
If you aren't happy, go back to msconfig and 'enable' everything to the default. None of the changes you make delete the programs.
Bye the way lots of MALWARE boots itself into existence through 'startup' automatically to give you problems and grief.