Suggest me best free antivirus software for my pc

I use many anti viruses for my PC but the outcome is not so good their working creates so many problems last time I use avast antivirus for my PC but it can’t give a good consequence. It deleted all my desktop file and important data from my computer when I registered in to the default it had change my personalized setting and all my files are deleted…and when any infected file is found it automatically restart the PC every time. I had to face lots of problem regarding this issue and slow processing also. Now I want a top antivirus for my PC. Please suggest me the perfect security service and from where I get this. I need a response please.

Hi Sachin,
I advise you to use bit defender anti-virus for your pc because it is better than others, Avira is also good.