Hello. Here is my problem that is making me a trouble for a few days now. Laptop has stopped seeing other PCs on LAN. I have two desktop computers and a laptop. Desktops can see each other and share files but laptop is not able to see any of them. It also stopped connecting to internet. I really do not know where to start and I hope you will help me with this problem.
First thing I would check is firewall on your laptop. If you have something like Zone Alarm then please uninstall it. Zone Alarm is known to make trouble even when disabled. These troubles, like connectivity losses, just happen without any apparent reason. If this is not the cause of your problem then you might have to deal with malfunction wireless network card on your laptop.