How to connect to internet via wired PC connection (reverse tethering)

Hi,

In the office we have PCs wired connected to internet. Wifi is disabled for mobiles.
I'm trying to find out if and how it would be possible to share PC's internet connection to connect DTEK50 to internet.

I know it is possible on some other mobile brands using reverse tethering. It can be somehow enabled in Developer options so when mobile is connected to PC via USB it offers RNDIS (USB Ethernet) option in USB Configuration. When I connect DTEK50 to Windows 7 PC I can see only:
- Charging only
- Transfer files (MTP)
- Transfer photos (PTP)
- MIDI
options but not
- RNDIS (USB Ethernet)

Is there something I missed or some other option to enable sharing PC's wired connection to DTEK50 via USB Cable?

Thank you in advance

Install a really small size WiFi dongle in your pc and you can do it via AdHoc network.. Its risky but I think this is the only option. :-)