My computer began responding differently and programs began to disappear. I am running Symantec Endpoint with real time protection. It did not recognize the threat. I am now having to use a boot disk, which I created from Windows Defender Offline. I ran Windows Defender Offline, and it found DOS/Alureon.E, FakeSysdef, and Alureon.FE.
I removed the infected drive and placed it in a portable enclosure. I connected this drive to another computer with current Symantec definitions. Again, Endpoint did not locate the threat, but MS Essentials located the threat; however, MS Essentials was unable to remove DOS/Alureon.E.
Why was Symantec Endpoint unable to protect against these viruses? Thoughts?
It will be helpful to understand how to prevent this situation in the future.