Malware is software designed to infiltrate or damage a computer system without the owner's informed consent. It is often a group term for anything harmful that runs on a computer, like viruses, spyware, adware, Trojan Horses, and rootkits.
These harmful programs most often attack Windows machines, which can be removed when caught early. By ignoring the situation or opening the program when prompted allows the malware to entrench itself into the system. It's highly recommended to restart your computer in safe mode and run Symantec as well as the program Malwarebytes.
Please note: Beginning in the 2014-2015 academic year, Gustavus Technology Services will no longer offer Symantec Endpoint Protection for installation on personally-owned computers. Campus network users (Windows) will still be required to have a functional antivirus program installed on their computer. These programs include Norton, Kaspersky, etc. On Windows 8 machines, the standard Windows Defender program is recommended.