Good concept and funny premise. I like how you have to constantly watch the first virus through your peripheral vision. One issue I had was that I felt like the second virus was almost never worth dealing with. It felt like if there was a situation where I couldn't sneak the window past both viruses that by the time I noticed it was too late to knock the virus over.
If you're careful you can move the game window under the second virus. I should have made this much more obvious/mentioned it somewhere in the game but I forgot to.
Also knocking it over is pretty much useless and you never need to do it. I think I'll make it a secret and have the stun time last a short while to tell the player how it isn't worth doing. Thank you for the feedback.