I built my computer in about 2012. Windows vista 64 bit. I installed windows xp as a dual boot because I have some software not compatable with vista. It has all worked fine with the exception that I could not connect to the internet in XP. Not really a problem. Last week, I installed another program in XP. Installed ok but would not work. Switched back to Vista. Could not connect to internet. Went back to XP and uninstalled program. I can now connect in XP but not Vista. Also I have lost my network connection to that computer. All are hard wired and work fine except the one not connecting. Any ideas?