No malware in any of the two computers.
I have removed the manual IP configuration (which was the only thing that made it work before) and now they connect but assign zeroconf IPs: 169.254.xxx.xxx and a subnet mask 255.255.0.0.
Funny thing is that now the Desktop computer can ping the Laptop computer (Laptop is the one with internet, and the one that should be the default gateway I think) using the 169.254 address.
I checked the TCP/IP configuration and DHCP Is enabled. Laptop has a crisp Internet connection.
Last time I solved this assigning a manual IP and DNS configuration, it used to work, now it doesn't work anymore.
What is going on?
