Network between laptop (7) and desktop (XP)

[KaFive]

Hi, Ill try to explain this as clearly as I can. I have 2 PCs, a laptop with Windows 7 Ultimate x32 and a desktop PC with Windows XP Professional x32.

The desktop PC connects to the internet through a wireless router, but with a wired connection (because it doesnt have a wireless adapter).

The laptop connects to the internet through the same wireless router, in this case with a wireless connection, as it has a wireless adapter.

The problem is, when I try to create a network between this 2 PCs to share files and printers, I cant see the laptop (win7) under My Network Places > Workgroup in the desktop pc (win xp). The same happens when i go to my laptop to check if my desktop pc appears under Network. It doesnt.

Both PCs have simple file sharing enabled, i disabled network passwords, i also tried to map network drives, the network is set to "home", nothing worked. I dont know what im doing wrong, most networking guides and walkthroughs are complicated and they didnt work for me.

Could someone please tell me what im doing wrong, or a simple step by step guide or link? Thanks!!

KaFive

edit 1: not sure if this helps: the desktop xp computer has ESET Smart Security 4 and the win7 laptop has Norton Internet Security 2010

edit 2: ok, now my windows xp desktop pc can "see" itself and the laptop, but i cant enter, it says: "You might not have permission to use this network resource..." and the latptop still cant see my desktop pc...

 

[StuberB]

here are a few settings you can check:

make sure all comptuers on the network do have Windows 7 protocol LLTDP (Link-Layer Topology Discovery Responder) enabled.
to do this: start > right-click on 'network' > properties > local area connection

You also need to install the LLTD protocol on the XP machines. Make sure all Windows XP machines have service pack 2 installed first. You can download this from the following site:

http://www.microsoft.com/Downloads/details.aspx?familyid=4F01A31D-EE46-481E-BA11-37F485FA34EA&displaylang=en
Next, you need to modify the LAN Manager settings all computers in the workgroup.

To do this:

Start > Run > Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Option > Double-click ‘Network Security: LAN Manager authentication level’ > 'Send LM & NTLM - use NTLMv2 session security if negotiated'

Reboot.

 

[chev65]

You shouldn't need to modify or defeat the NTLM security in order to share those machines. Also the LLTDP update is only to make the XP machines show up on the network map.

You might want to turn off the simple file sharing on the XP Pro machine because it can cause problems such as you are describing.

The other possible problem is your security, either Norton or Eset can cause sharing problems.

 

[KaFive]

Thanks a lot, I'll try those things now.