This search shows numerous courses available,using the magazines like Floodlight and Hot courses,there is also Open University.
Do you wish a 'distance' learning course or attend locally.?
Check your local college and or night/day courses.
I myself am possibly looking to take a course here About Us - Kandu IT
, not for a career change but mainly for personal gain.
Obviously check prices,can you get government aid ?,and also student reviews,a must,to ascertain the best college and course (that word again).
Good luck to you on your search and your future prospects.
Not sure about the virus/malware aspect.