Sharing Windows7 with XP, RD from XP sp3 to Server2008 or newer

XP computer on a home network with other Windows 7 and Vista computers. All computers are members of  MSHOME ( or other network name). 
On the Windows 7 computer right click the drive and select 'properties' then go to the 'security' tab. Click 'Edit' then on the next window click 'Add'. In the box that says "Enter the object names to select" type NETWORK then 'Check names' select the first entry (NETWORK) and OK (twice). Under 'Group or user names' select the entry you have just added - NETWORK and click the permissions you want in the check boxes, then click 'apply' and your XP computer on the network will now be able to access the drive.

remote computer requires Network Level Authentication which this computer does not support

1. Click Start, click Run, type regedit, and then press ENTER.
2. In the navigation pane, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa

3. In the details pane, right-click Security Packages, and then click Modify.
4. In the Value data box, type tspkg. Leave any data that is specific to other SSPs, and then click OK.

5. In the navigation pane, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders

6. In the details pane, right-click SecurityProviders, and then click Modify.
7. In the Value data box, type credssp.dll. Leave any data that is specific to other SSPs, and then click OK

8. Exit Registry Editor.
9. Restart the computer.

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