Vista - Help needed with file/printer sharing on Vista

I've got 3 computers at home:
- CompA = Vista Business 64-bit SP1 and has shared drives and a printer attached
- CompB = Vista Business 32-bit SP1 and has shared drives
- CompC = laptop with Windows XP SP3

CompA and CompB can see each other and CompB can print on CompA's printer fine.

CompC can see CompB just dandy and use the shared drives.

CompC cannot see CompA at all. trying "net view \\CompA" gives

System error 58 has occurred.
The specified server cannot perform the requested operation.

I am able to ping CompA from CompC, but not use net commands.

All computers have workgroup set to WORKGROUP.

I've tried turning off the firewall on CompA but it makes no difference. The only difference I can see between the network configuration of CompA and CompB is in "Network and Sharing Center" in the "Network discovery" setting. CompA says "On" and CompB says "Custom".

I've googled "System error 58" and tried setting network security to NTLM v2 on the XP machine, but it didn't make a difference.

Since CompC can successfully work with CompB I don't think I need to change CompC much, so if anyone has suggestions on what to try with CompA I'd be very interested. Thanks!

Sorry can't help.

Good luck...

Hmm, it's working now. Temporarily disabling the firewall on the XP machine let me do "net view \\CompA" properly. Enabling the firewall again continues to let it work. I'm not sure why, but I'm happy if it's working.

Thanks for the good luck wish Trax1963!