Hello MillerLite1005,
Welcome to the HP Forums.
I understand that you're having an issue with scan to computer on your Offficejet 6700. I will do my best to help.
To attempt to resolve the issue I have a document for you to follow: Printer Does Not Maintain Wireless Connection.
You also mention the notifications coming up on two laptops. I have a post: Re: HP OfficeJet 8600 Pro - Scan To Computer by ferRX for windows, that describes how to turn off the notification that pop's up off if you'd like to do this.
You may also continue scanning even though the scan to computer isn't active. If you go to either your printer assistant (icon of the printer) or HPscan you should be able to scan from the computer itself.
Please let me know if this was helpful to you.
Thank you for posting on the HP Forums.