Impossible to tell from what you've provided, but it sounds like the
wireless mouse is unreliable.
Are you also using a wireless keyboard? Mice can't type.
Are you, by any chance, using a KVM? I ask because most wireless mice and
keyboards do not work reliably through a KVM.

You mention virus in your article title. Can we assume that you've
completely scanned you computer with a fully-updated, competent anti-virus
program and that you've also scanned with a good anti-malware product?

This question would be better addressed in a Windows group, but you don't
mention what OS, you're using, so I can't suggest any specific group.

Have you contacted the mouse manufacturer for support or tried updated
drivers?