How can I transfer photos wirelessly from the P1000 to my PC? Thank you,
You can't directly. The P1000 uses Nikon's Snapbridge app (which is mobile-only) to configure wifi settings via Bluetooth, in order to transfer photos and control the camera via the mobile device only.
Using Snapbridge, the only hope of transferring files wirelessly to a PC is by using an Android device, and somehow using the device as a wireless bridge between the camera and PC. I have no idea if Android devices support this capability (whether any do, or just some), but I doubt it is supported out-of-the-box. I know certainly that Apple iOS devices do not support this functionality.