Adam, a novice computer user, works primarily from home as a medical professional. He just bought a brand new Dual Core Pentium computer with over 3 GB of RAM. After about two months of working on his new computer, he notices that it is not running nearly as fast as it used to. Adam uses antivirus software, anti- spyware software, and keeps the computer up-to-date with Microsoft patches. After another month of working on the computer, Adam finds that his computer is even more noticeably slow. He also notice
A. Computer is infected with the stealth kernel level rootkit
B. Computer is infected with stealth virus
C. Computer is infected with the Stealth Trojan Virus
D. Computer is infected with the Self-Replication Worm