Firewall or security settings preventing all internet use

[kingmo1215]

my mums computer (yes, she's a 75 year old terrified silver surfer).... suddenly stopped connecting to the internet.
I suspected her router... however I took it to my home to try it out on my router (whihc works fine on all our computers here).... and the same problem.. her computer says it's connecting.. accepts the WPA key etc.. but still no internet appears. when you hit diagnose on the failed window.. it says firewall or security settings are preventing acccess to internet!
I cant see anything obvious going on.. I am a non techie so be gentle! but i need some help so she can resume doing her own tesco order before it drives me nuts!!!

 

[Dark Lord of Tech]

This topic has been moved from the section Windows 7 to section Wireless Networking by Area51reopened

 

[kingmo1215]

thank you area51.... but do you have the answer??> what should her firewall settings look like!?!?!