I tried using Hamachi to play starcraft 2 but for some reason it did not work for me, I could not get connected to anyone. So I just quit with it.
But I hear that Vista has a lot of compatibility issues.
Here is some possible solutions...
1) Open the appropriate ports for Hamachi in the router (port forwarding).
2) Completely disable Windows firewall: Enter administrative options for the system and turn off the firewall in three places (domain, private and public networks), aside from disabling it from the security center.
3) Also open ports in Windows firewall (for Hamachi) just in case.
4) Set up a static IP address for your home network and set the Hamachi network to 'private' status and enabled file-sharing for it.
5) In the Hamachi program options, uncheck the box that says 'disable vulnerable Windows services' or whatever.
You could also look through the official user's guide and the unofficial guide for more suggestions:
https://secure.logmein.com/products/hamachi...User_Manual.pdfhttp://www.angelfire.com/games5/darkcry/hamachi_eng.htmHope I could be of some help!
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