How to get SonicWALL Global VPN to work with Windows 8.1

IPSecuritas is supposed to work. When I used to work at a company that was a SonicWall reseller I never could get it to work. Theoretically the Sonicwall is doing straight IPSec VPN setups, but I was either missing a step or otherwise messing it up.

The answer to the question title I would say is a pretty hearty 'no' - however...

any way I could get connected with or without the official Sonicwall client

Yes! Certainly this isn't limited to SonicWall, but here's a link to their browser-based VPN appliance. I could've sworn someone was pitching a separate license/service we could purchase for our existing firewall, but I may have misunderstood - I'm not finding a link. However, that would get around your non-admin access to the computers within reach.

You will not be able to install the VPN client through any clever tricks. The VPN adapter functions to windows similarly to a hardware network adapter - that is to say, you need permissions such that you'd be able to add "hardware" to the system. Blocking non-admins from this kind of access is a central part of the distinction between admin and user access.