Windows 7 网上邻居 登陆失败：未知的用户名或错误密码 帐户问题

只要给ADMINISTRATOR设置密码,然后访问输入用户名和密码也可以.不过有点麻烦!
目前这个原理就是
1. WINDOWS防火墙,允许 文件共享和打印机,
2. 允许访问时候不需要密码

REGEDIT

Windows Registry Editor Version 5.00

;防火墙中允许共享和打印机
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Epoch]
"Epoch"=dword:000000c3
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Epoch]
"Epoch"=dword:000000c3
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List]
"139:TCP"="139:TCPocalSubNet:Enabledxpsp2res.dll,-22004"
"445:TCP"="445:TCPocalSubNet:Enabledxpsp2res.dll,-22005"
"137:UDP"="137:UDPocalSubNet:Enabledxpsp2res.dll,-22001"
"138:UDP"="138:UDPocalSubNet:Enabledxpsp2res.dll,-22002"
;共享访问允许空密码登陆(默认是dword:00000001)
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Keyboard Layouts\E01F0404]
"limitblankpassworduse"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa]
"limitblankpassworduse"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa]
"restrictanonymous"=dword:00000000

保存为.reg文件的格式注入即可，重启系统，

试一试看！
如果不行；请您清楚以上信息
如下：
;防火墙中允许共享和打印机
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Epoch]
"Epoch"=dword:000000c3
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Epoch]
"Epoch"=dword:000000c3
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List]
"139:TCP"="139:TCPocalSubNet:Enabledxpsp2res.dll,-22004"
"445:TCP"="445:TCPocalSubNet:Enabledxpsp2res.dll,-22005"
"137:UDP"="137:UDPocalSubNet:Enabledxpsp2res.dll,-22001"
"138:UDP"="138:UDPocalSubNet:Enabledxpsp2res.dll,-22002"
;共享访问允许空密码登陆(默认是dword:00000001)
[-HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Keyboard Layouts\E01F0404]
"limitblankpassworduse"=dword:00000000
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa]
"limitblankpassworduse"=dword:00000000
;2.3版限制问题
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa]
"restrictanonymous"=dword:00000000

保存为 。reg文件注入即可！！！

网络——更改高级共享设置——家庭或工作/公用——关闭密码保护共享、启用文件和打印机共享