And tell Alice to stop clicking on "Lets us check your computer for problems' links on websites.
That thing is another Trojan Hijacker, also commonly known as a BHO or Browser Helper Object. It will keep popping back to tell you to buy it's software to 'fix' your PC. Send money, still no fix.
McAfee Stinger and Malware Bytes (MBAM) will get it normally. Both are free from McAfee and the MBAM site.