|Read your posting from the link above.|
Windows firewall disables ping from other PCs by default.
I guess it is a firewall issue.
If you have installed an additional firewall and turned it off for testing, make sure, that the windows firewall is also turned off.
Some third party firewalls do this during installation, but even not all.
So crosscheck, whether the windows internal firewall is also turned off and try again.
If the antivirus, you're using has also some rudimentary firewall functionality, you have to also disable this for testing.
Post back the result.
The original poster should always write the last response !!!
Let us know, if the problem is solved !!!