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Windows 7: Cannot Access MacBook on W7 Workgroup After Upgrade

03 Dec 2009   #1

W7 Pro
 
 
Cannot Access MacBook on W7 Workgroup After Upgrade

I have had a Windows workgroup for years, linking PCs and Macs as well as a Linkstation Network Drive through a Time Capsule Router/Hard Drive Combo. Immediately after upgrading from Vista Business to Windows 7 Professional on my Sony Vaio VGN-Z750D, I can see the Time Capsule and MacBook but can not access the MacBook Pro. I am able to access the Linkstation and the Time Capsule. However, the system does not ask me for a username and password when I try to access the MacBook Pro, and I get an error message that Windows cannot access the MacBook. The problem seems to be on the Windows 7 end, for I am able to access the Sony on the MacBook Pro.

The workgroup name is the same on all computers. I had to reset the workgroup name on the Sony, because for some reason the Windows 7 upgrade renamed the workgroup name to WORKGROUP without asking. I reset it to the name used on all our mchines. The only variable changed is the Windows 7 upgrade.


Please advise. Thanks.


My System SpecsSystem Spec
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03 Dec 2009   #2

W7 Pro
 
 

FIXED IT!!! Found the answer on the Windows 7 Forum

Accessing Mac OS X Windows Sharing from Windows 7
Windows 7 will not work with Mac OS X Windows file sharing support by default. If you attempt to access a folder shared from Mac OS X, Windows 7 will display a logon error repeatedly.
The problem is that Windows 7, by default, will only use NTLMv2 for authentication, which is not supported by Mac OS X's Windows Sharing service.
The other problem is the Minimum Session Security for NTVLM SSP based Clients.
To get around this:
1. In Windows 7, open the Control Panel
3. Double-click Administration Tools
4. Double-click Local Security Policy
5. Expand "Local Policies" and select "Security Options"
6. Locate "Network Security: LAN Manager Authentication Level" in the list and double-click it.
7. Change the setting from "Send NTMLv2 response only" to "Send LM & NTLM - use NTLMv2 session if negotiated"
8. Network Security: Minimum session security for NTLM SSP Based (including secure RPC) Clients
9. Change the setting from "require 128 bit" to unchecked (No Minimum)
10. Click OK
My System SpecsSystem Spec
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 Cannot Access MacBook on W7 Workgroup After Upgrade




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