Sending audio/video to projector wireless without connecting the projector to Wifi

I have a customer with a special problem. They have very tight security in the wifi network, nothing gets on it without installed certificate. This rules out wifi-connected devices as printers, projectors and items like Miracast.
They would still like to send audio/video to a projector - while maintaining internet connection on the laptop.
I they could live without internet it would be easy as pie to connect a Miracast with an ad-hoc connection. But that is not what they want.
So I have as I can see it at least two choices, but do not know if either will work:
1. Use two different wifi connections at the same time (could be possible with an extra wifi-dongle, but have never tried). That is, the native wifi connected to the internet wifi, the second one as an ad-hoc to a Miracast.
2. Use a different solution all together, but I have found no good alternative.

To make it even more complicated, there will be a lot of different laptops connecting to the projector, and not all of them have HDMI out. And that is also why no software installation is acceptable. It should work with no hardware/software installation, on at least Win 8 and 10. If using a hardware to send a/v to the projector there have to be at least HDMI and VGA(plus sound) inputs, preferably connecting to a wireless HDMI only reciever.
kapten_brumOwnerAsked:
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kapten_brumConnect With a Mentor OwnerAuthor Commented:
Thank you for the link, ReneGe, but that device also need software installation.
I finally found this product:
https://www.startech.com/AV/Extenders/HDMI/HDMI-Wireless-Video-Extender-Kit-w-Portable-Transmitter-Ultrabooks-Laptops-50ft~ST121WHDST
It requires no software.
Thank you for your input.
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bbaoConnect With a Mentor IT ConsultantCommented:
considering the EXISTING devices and infrastructure that your client currently has, without ANY compromise to the current security policy and restrictions that have been applied to your client's site, I reckon the best solution is to use a second wireless adapter on laptops for connecting wireless projectors over a separate WiFi connection. this should be most economic and most easy to implement according to the current situation.

using two WiFi connections while keeping the Internet accessible is practical, just make sure the wireless connection for Internet has higher priority (lower metric value) in the routing table. if not, the laptop user may use ROUTE ADD command to change metric accordingly.
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Craig BeckCommented:
Adding a second adapter would be a security issue for me.  Why allow an ad-hoc network to potentially allow access to my EAP-secured network?  It doesn't make sense.

Can you not wire the projector to the network?
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ReneGeConnect With a Mentor Commented:
Have you considered this:
http://www.staples.ca/en/Actiontec-ScreenBeam-Wireless-Display-Kit/product_1560841_2-CA_1_20001

Source:
https://www.google.ca/?ion=1&espv=2#q=wireless%20hdmi%20extender

PS: Like Craig was saying; ad-hoc is not wise to use for a company nervous about security.

Cheers mates
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kapten_brumOwnerAuthor Commented:
I found the exact product I asked for. No software installation at all. The other solutions all demanded installation/configuration on every laptop that was used. Since many different laptops will be used at the site, a software-free device was required.
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ReneGeCommented:
Thanks for sharing :)
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