ACER aspire h340 cannot be seen by a Windows 7 desktop

hexagram
hexagram Member Posts: 4 New User

I bought an aspire H340, which ahs worked well for three or four years.  When I bought it, I had an XP laptop.  Six months ago, I switched to a Windows 7 desktop.  The new computer cannot see the H340 on the home network, so I cannot access my data on the H340.  The H340 is definitely connectd to the network: the network light on the front says so.

 

When I try to reinstall the H340, the installation stops when it says that it cannot see the H340.

 

How can I get the new computer to work with the H340?