Yakisoba wroteThe catch is that I am not really a big techie person
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Example of a working OpenVPN setup here:
https://forums.openvpn.net/topic7806.html
It's for a Windows 7 PC. The Windows XP example is not much different.
This might be your best option so long as China is allowing access to the OpenVPN port / protocol.
I can only imagine your other options might be to install: Proxy server, VNC, or IPSEC vpn. All would have their + and - points.
Since you said the PC is online 'most' of the time, the challenge you might need to tackle first is to get OpenVPN server to come up automatically after a PC restart. That piece of info is not included in the example.
Read over the example I provided and see if it's not too techie for you (I think you can do it :] ).
ps.
I just thought of another caveat with this solution. At the moment the example above is relying on Google DNS being pushed to the client. So, effectively it will work only so far as Google DNS is available in China. The easy solution is just to replace Google DNS with a DNS that does indeed work in China (research required on your part).