Win7 cannot access WinXP shared files

can be accessed with the Win XP machine, but cannot access the shared file with Win 7 machine

tip: You do not have permission to access. Please contact your network administrator to request access

I found the information on the Internet.

Do the following actions

1. Open Network Places → local connections → properties, "see if the Microsoft Network file and Printer sharing is installed", if it is not installed, install it;

2. Copy the following code into Notepad, and be sure to copy it into one line ! Then save, file type select "All Files", name is 123.bat
REG ADD HKEY_LOCAL_MACHINE\System \currentcontrolset\control\lsa/v restrictanonymous/t reg_dword/d 0/f

runs this code on XP, after running, and then Win7 can access XP!