Problem Network with Plan-G

[Patliv]

Hello

Two weeks ago I have Installed Plan-g version 3. I have installed .net framework as required by the soft.
During 2 days, my computer was running slower but it was running properly.
After 2 days, Microsoft has updated .net framework to version 4. Immediatly after the reboot I have lost Internet access and my local network access. For all others members of the network no problems.
So I have tried to restore before the installation of .net framework V4 and the problem was remaining.
I have been obliged to restore the system on the restore before Plan-G V3 and all became normal. But I can't use Plan-G witch seems to be a very nice software. In fact, I don't know is the problem is coming from Plan-G V3 or .net framework.
Thank you for all to help me to find an issue and fix the problem.

System Windows 7 Premium
Dell XPS 8100
Ram 12Go