The OS is Windows 7 SP1 (32-bit), as I've stated before.
The firewall is Windows native, and is on, AV is ESET and is partially off.
Turned AV completely off, had to restart computer.
Turned firewall completely off. advfirewall show allp state showed 3 offs.
Shares were left set the same as suggested above.
Tries with Network connection off, didn't know if turning off firewall would let something in. Also tried it with Network on. Didn't work either way.
If it's impossible, it's OK, I'll have to deal with the fact that the OS has some issues and that's it.