A+ or Security+ NEED ADVICE ASAP

in A+
Hello, I just started a job at the help desk at the agency I work at. I have VERY light IT knowledge. I am required to obtain either A+ or Security+ within 90 days or lose my job. I've always heard that A+ was the easiest... however, I'm thinking maybe not so true. LOTS to memorize and I've barely touched the inside of a computer except to install new RAM or trade out a hard drive. I have a very basic understanding of computer security - difference between phishing and a virus. I have 90 days. Please help me understand which may be easiest to obtain - from a memorization and study perspective.
Comments
Less to memorize. 1 test instead of 2. And in my opinion, more interesting topics.
I did Net+ -> Sec+ -> A+ in that order. And even still, it took me 4 weeks to get Sec+ as opposed to ~ 10 weeks for A+, even tho I had both my Net+ and Sec+ knowledge under my belt and hardware knowledge from building computers in the past.
For Sec+ I'd recommend Darril Gibson's book and Professor Messer's videos. That should be all you need. Make sure you wait and don't take the exams in the back of the book until after you've finished reading. Then make sure you understand why each correct answer is correct and why each wrong answer was wrong.
Good luck.
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'Lite' experience is a vague word. Look at the Exam objectives for both and decide which one you feel more comfortable with. Security+ introduces lots of concepts that some would feel are advanced compared to A+ (viruses and malware is like 2% of the exam…). A+ is a foundation of pretty much overall technology, and it may be the easier route if you understand it.
I do think DoubleNN's thought on the Security+ is actually a good idea, because there IS less to memorize, but still, if you don't understand what a firewall is or a port, then you might run into some trouble. DGibson does explain it -- but he clearly states that the book is for someone with experience...
In my opinion, I think you should go A+ just because it'll benefit you. But again, review the exam objectives for both exams and decide which one you feel you can do without issue. Look at reading material as well. Theres ton's of people in the A+ Forum who would recommend a book. Professor Messer has free videos to get you A+ certified and Darril Gibson's book pretty much is spot on with the Security+ exam (Read cover to cover, do all the practice tests).
90 days is plenty to get all that stuff done. Good luck.