Windows 7: Lost network locations

OK I am running an MSI netbook with windows 7 starter, please bear with me as I am a bit of a windows noob.



I had the machine setup so that I could see all the machines on my home network connected down the side under 'network'. They all belonged to the same workgroup and I could download and transfer files when all of a sudden they vanish, I have tried enabling file sharing and looking at the workgroup but to be honest I am at a complete loss, everything was working fine and then everything on the network vanished apart from a printer.
I can ping the ip address of the server where all the files I am sharing are, and if I put the local ip address into chrome I get a page I was playing with in a web folder coming up but that is it.

If anyone has any idea as to what might be going on please let me know.

What anti virus software do you have installed?

I have comodo installed, thanks for replying.

I solved this after a days stressing and rolling back my pc, all I had to do in the end was reboot my router. What had me stumped was the fact that none of my linux boxes had a problem connecting and neither did my wifes vista machine.

Can I mark this solved somehow, it may help someone else to be not quite so much of a muppet.

BTW if anyone has any idea as to why this happened I would be interested.