PLZ HELP ME WITH MY COMPUTTER!!!?

I bought a lenovo computer a week ago, I wanded to instal winrar so I went to this site: http://windows10portal.com/download-winrar/ I installed te file I downloaded, then i got a lot of popups about a trojan horse virus attack from my security software McAfee, and my browser when to a lot of sites and a lot of... show more I bought a lenovo computer a week ago, I wanded to instal winrar so I went to this site: http://windows10portal.com/download-winrar/ I installed te file I downloaded, then i got a lot of popups about a trojan horse virus attack from my security software McAfee, and my browser when to a lot of sites and a lot of program shortlinks popt up my desktop, I didn t knew what to do so i started to scan all the programs and close al the pages, i also deleded so things out of my software like pc speed.exe and a weird kind of browser and I still have on other weird program on my desktop called driverrestore, plz someone help me. I really don t know what to do and I thing I maby deleted something wrong, I also got the question if i wanted to put so me dangerous programs in a mode that they waren t daneroug annymore and I pressed ok. did i do annything wrong and is there anything i really have to do?
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