Need help potential undetected virus

Hello all hope everyone is well I seem to need help with a undetected virus. i hope I am in the right forums sorry if I am not. It seems my computer is doing weird things sometimes when a print somthing two print windows pop up also two PDF windows pop up when I only opend one. Sometimes even when I open my web browser two open up. I tried running my Norton 360 product and nothing was detected. I also ran trend micro house call and are preparing to run malwarebytes. I am pretty sure nothing will be detected. If someone can help me to remove the malware I’d appreciate it thanks.