Any "cold-call" you receive from DeLL, Microsoft, your ISP, or any other party claiming that they were monitoring your computer usage and discovered a virus/malware, is a SCAM.   Just hang-up on them, and forget about it.  
I've been receiving calls from (888) 272-2357 and (866) 795-5597 (latter number is actual Dell support) almost daily. I answered the first time and fended them off because I was at work. Afterwards I did a quick Google search and discovered that it was a possible scam. Is this still true? I saw the sticky in the forum, but the link it provides is broken. Could someone please clarify? I am also suspicious because I do full scans every night with Malwarebytes and nothing ever shows up...
Is Dell really able to detect malware on our computers and do they actually 
call people about it?