Unresponsive keyboard

I am using an Acer laptop, running Windows 10.  I have McAfee firewalls.

Frequently keystrokes are missed, as if the computer is hung.  It clears eventually, but is very inconvenient.  And then it recurs.

I wonder if something is interfering with the normal operation.

I have run CCleaner, but nothing else since this is the first problem that I have had with this PC.

thanks for the help.

I was prompted that I had received a reply.  However, I cannot see anything (having logged in).  Can you advise, (or is this "prompt" just recognising the initial post)?

I had to delete my post as you're asking for malware infection removal. You're case will be look after by malware removal expert.