Network Share not working through Windows 7 home premium

You have windows 7 ultimate and you try to connect to a share on  windows 2008 r2? If so this is another issue... Registry setting should not be needed for yor case... The are for connecting a windows 7 home to a windows 2000/2003 server.  What is the message you get? any event viewer log?

Since you refer to a Workgroup, you don't have the same issue as the original poster at all. Without knowing anything about your computers and your network, all I can do is give you general troubleshooting steps.

Problems sharing files between computers on a network are generally caused by 1) a misconfigured firewall or overlooked firewall (including a stateful firewall in a VPN); or 2) inadvertently running two firewalls such as the built-in Windows Firewall and a third-party firewall; and/or 3) not having identical user accounts and passwords on all Workgroup machines; 4) trying to create shares where the operating system does not permit it.

In Windows 7, go to Control Panel>All Control Panel Items>Network and Sharing Center. Click on "Change advanced sharing settings". You don't want to use Homegroup unless you have all Windows 7 machines. If you do and you want to use Homegroup, see Windows 7's Help & Support. Otherwise, in the Advanced Sharing:

Turn ON network discovery

Turn ON file and printer sharing

Turn ON sharing in the Public folder sharing section

Turn ON password protected sharing

A. Configure firewalls on all machines to allow the Local Area Network (LAN) traffic as trusted. With Windows Firewall, turning on Windows 7's File and Printer Sharing as above will take care of this for you. If you aren't running a third-party firewall or have an antivirus/security program with its own firewall component, then you're fine.  With third-party firewalls, I usually configure the LAN allowance with an IP range. Ex. would be 192.168.1.0-192.168.1.254. Obviously you would substitute your correct subnet. Refer to any third party security program's Help or user forums for how to properly configure its firewall. Do not run more than one firewall. DO NOT TURN OFF FIREWALLS; CONFIGURE THEM CORRECTLY.

B. For ease of organization, put all computers in the same Workgroup. This is done from the System applet in Control Panel, Computer Name tab.

C. Create matching user accounts and passwords on all machines. You do not need to be logged into the same account on all machines and the passwords assigned to each user account can be different; the accounts/passwords just need to exist and match on all machines. DO NOT NEGLECT TO CREATE PASSWORDS, EVEN IF ONLY SIMPLE ONES . If you wish a machine to boot directly to the Desktop (into one particular user's account) for convenience, you can do this:

Start>Search box>type: netplwiz [enter]

Click on Continue (or supply an administrator's password) when prompted by UAC

Uncheck the option "Users must enter a user name and password to use this computer". Select a user account to automatically log on by clicking on the desired account to highlight it and then hit OK. Enter the correct password for that user account (if there is one) when prompted. Leave it blank if there is no password (null).

D. If one or more of the computers on your network is XP Pro or Media Center, turn off Simple File Sharing (Folder Options>View tab).

E. Create shares as desired. In Windows 7 I usually share out the user's Desktop and the Public directory.

F. After you have file sharing working (and have tested this by exchanging a file between all machines), if you want to share a printer connected locally to one of your computers, share it out from that machine. Then go to the printer mftr.'s website and download the latest drivers for the correct operating system(s). Install them on the target machine(s). The printer should be seen during the installation routine. If it is not, install the drivers and then use the Add Printer Wizard. In some instances, certain printers need to be installed as Local printers but that is outside of this response.

MS-MVP - Elephant Boy Computers - Don't Panic!

I have the same problem too... I ve already opened identical users in all workgroup PCs and all pcs works fine connecting to each other shares except the Windows 7 home which is always asking for username and password for the connection... On the other side I get an 681 event: MICROSOFT_AUTHENTICATION_PACKAGE_V1_0.  Any idea???

Make a user account and password on the server and other machines which matches the one on the Windows 7 computer and you will be able to use domain resources. Unfortunately, since Windows 7 Home Edition cannot join a domain you will always get the initial prompt for credentials. If this is a problem, upgrade to Windows 7 Professional and join the computer to the domain.

MS-MVP - Elephant Boy Computers - Don't Panic!