Usb device connected popup (without a usb device in)

Hi…
My pc was hacked a few weeks ago,i had no choice but to re-partition and re-format the entire thing.
every 10-20 minutes i get a pop up saying theres a new usb device plugged in (sometimes generic sometimes with a weird name) when i look at my explorer, no drive is there.
this happens even if my pc is offline. i reinstallled and re-registered avg but still i get those popups.
any help?

Hello Noam, 

We are sorry for the inconvenience caused. We will check and help you to resolve it. 

Could you please share us the screenshot of the pop-up which you want to stop receiving? 

You can post the screenshot here in your topic. Click on Answer & then click on the Image [mountain symbol] & follow the instructions.

Thanks in advance.

Hello Noam, 

We are sorry for the inconvenience caused. We will check and help you to resolve it. 

Could you please share us the screenshot of the pop-up which you want to stop receiving? 

You can post the screenshot here in your topic. Click on Answer & then click on the Image [mountain symbol] & follow the instructions.

Thanks in advance.