I have 2 PCs networked thru a router. One runs Vista the other XP. Until last week everything was fine as far as sharing printers and files. Then all of a sudden they don't recognize each other and on the network map of the Vista PC there is a switch inserted between the router and the the PCs. NO settings have been changed and and all settings are set for sharing. Help---need toget these PCs sharing again.J Pikser

on vista turn on the network discovery. Also check if firewall is blocking the connectivity.Regards, h9ck3r.

on vista turn on the network discovery. Also check if firewall is blocking the connectivity.Regards, h9ck3r.

Hi, Please check the settings on the Router. Reset it if necessary. Regards,Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

If it's wireless connection, check out these wireless network troubleshooting tips to help you. If it's wired connection, check out these wired network troubleshooting tips to get more ideas. Most likely it's caused by minor issue only, hope this helps.