The music, sounds and gameplay of this game are great! However, I think that you could improve on some aspects: Firstly, the background didn’t fit into the “PC virus” style. Consider adding a background full of ones and zeroes. This would fit that style better. Also, the “game over” window should be the windows “:(“ page.
For the gameplay, consider adding a way to fight for the player. Antivirus don’t avoid viruses, their job is to destroy them.
Overall, nice game. Continue creating more!