It's my guess that the McAfee is for a trial period of 60 or possibly 90 days. If so you will get pop-ups towards the end of the trial period which will be to persuade you to take out a years subscription at varying prices, dependent on how many Computers/Laptops you wish to licence.
At this stage you could go along with the trial, but it would mean clearing out Avast until you need it. Personally, I would get shot of McAfee right away and settle for the free Avast.
Alternatively you could remove both Avast and McAfee and trust your arm with the inbuilt Microsoft programme. I think you would be quite safe with Windows Defender to which you could add the free edition of Malwarebytes.
Whatever you decide to do, I would certainly recommend that you install the free edition of Malwarebytes which will Not conflict with any Anti Virus programmes.
https://www.malwarebytes.org/
Hans.