Not to beat a dead horse, but XP and 7 sharing...

I have been searching for an answer to my questions, I have tried every suggestion, and have even tried other forums. My problem is this...simplified.

I have 1 Win7 Pro machine, 3 Vista HP machines, and 1 XP machine (laptop on WiFi),
1 BOX 360, and 2 PS3's.

All the Vista machines and the 7 machine see eachother, and share as permissions allow. All sharing/discovery is working with the 360 to them as well. My PS3's don't show up in the map, but they are "seen" and communicate as well perfectly thru various media servers, even with cross shared libraries, AS WELL as my BlueTooth subnet running good for cell phones etc.

Basically, all my networking appears to be solid, even with various cross shares and multiple devices.

The only computer not visible is the XP machine. It doesn't appear on the maps of the 7 machine or the Vista machines, and I can't see the other machines from the XP laptop.

The REAL strange thing is that I have WMP on all the machines in the house and all allowed to share eachothers libraries. ALL machines see the XP's WMP library and can access it.
The XP WMP CANNOT see the other WMP libraries.

I just don't understand what to do here. I have even gone as far as completely disabling all av's and firewalls, making sure to double check all media sharing and such.
I have tried manual static ips, I have tried DHCP Reservation.....all the same resuts

So all sharing with 7 and Vista are good, even with gaming/media consoles. My router's DHCP Reservation Table is showing ALL devices with proper ips and full discovery.

XP just won't agree with them. I believe I have tried everything possible....maybe someone can point me to the right link, I think I have GOOGIFIED myself and am lost on where to go from here. I have a great, nearly flawless network that gives me little to no grief, but the OS's are having a lover's quarrel or something.

I'm not sure why you keep using the term Librarys to describe the files on the XP machine?

First you mention that you aren't using Librarys then you keep saying that the XP machine has a Library? XP can be in the same workgroup as your Win7 machine which should allow you to share files between them but they can't use or access Librarys.

If you are using the same User name on the XP machine as on another machine then change the User name on the XP machine. Matching User names will cause problems with seeing other machines and sharing between them.

Try this fix in the link below, you might want to disable UAC also.
Error message when you try to access a Windows XP-based network computer: "You might not have permission to use this network resource"

You can also try this method on the Windows 7 machine.

Goto... Control Panel > Administrative Tools > Local Security Policy > Local Policies > Security Options

Scroll down to... Network Access: Sharing and security model for local accounts

Select... Guest only and not Classic.

There is also this walkthough that might help.
How to make Windows 7 work with older Windows versions for networking and file sharing.

As for XP not showing up on network map, try this link.
XP Computers in the Windows 7 Network Map

I was using the term libraries as in WMP....wrong terminology I gues...I can see why confused.

1st link doesn't apply. I don't get errors, I don't see anything on the map or in the "network" folder.

2nd link....will have to read.

3rd link....saying "setup has detected that the Service Pack version of this system is newer than the update you are applying" Which means I should have the LLTP installed already in this XP machine? So why it won't work I have no idea.....I hope the 2nd link might help.

I think I may have figured it out.

My "server" service was stopped. I found a post that caught my eye here.....

XP Computers in the Windows 7 Network Map

Specifically this, in Barman's post about 5 or 6 down....

As for setting the network things to watch are

network set as Home or Work (not public)
All systems on same IPv4 network segment, and member of same workgroup.
Firewall set to allow sharing
network discovery and file and printer sharing both on
Identical username on all systems and at least one folder shared using advanced sharing
Password controlled sharing is optional but recommended

I realized I hadn't set up a shared network folder myself on the XP machine (it has no media, so I didn't think to do this). So I then tried to do so. That's when I was told via pop up window that the action could not be completed because the "server service was stopped".

I went into Services.msc, then started the service (server), and set it to automatically start upon boot up. As soon as I did this, the XP machine showed up on in the network folders of at least 2 machines.....1 Vista and 1 Seven.

Unfortunately I hit shutdown to see if it would auto-start, and Windows update is now doing a bunch of stuff so I can't yet confirm FULL visibility everywhere, but I think I am nearly there.

Once the updates are complete, I will post back with confirmation. Thanks for your valiant efforts though.

Solved!!

Thanks to those who tried to help.

Contrary to what it says you do not need to use the same User name and passwords on all machines, in fact doing this caused me nothing but problems in the past.

I set up sharing with my old XP machines countless times and never had a single problem and I certainly never needed to use the same User name and passwords. I think it's interesting how many people seem to have trouble doing this procedure.

From my point of view, I think it's pretty tough, if not impossible, to figure out exactly which procedure they forgot to perform.

I thought it was obvious that at least one folder needs to be shared in order for the machine to show up? It's the same for Windows 7 also and always has been that way far as I know.