Yes I would recommend Avast (I am biased I use it)
A few things to note with Avast to make it work better :
The Avast Online Security addon can cause problems on some systems, so it may need to be disabled in IE. I myself do not use it as it does not play well with IE11 yet
To harden the system even more set the hardened mode to aggressive
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Then any unknown or low prevalence programme will generate a small popup. If you are happy with the programme then click add and exclusion and the programme will run
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Link:
Avast Free
If you have any questions then please ask