一，windows update无法自动更新，错误代码80246008

解决办法，参考

http://windows.microsoft.com/zh-CN/windows7/Windows-Update-error-80246008

如果遇到无法启动BITS服务（错误1075：依存服务不存在， 或已标记为删除）

请执行如下步骤：

将以下代码复制保存为“某某.reg”，然后双击导入，重启计算机（切记！！）,问题解决。

代码：

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\EventSystem]

"DisplayName"="@comres.dll,-2450"

"ImagePath"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,\

74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,\

00,76,00,63,00,68,00,6f,00,73,00,74,00,2e,00,65,00,78,00,65,00,20,00,2d,00,\

6b,00,20,00,4c,00,6f,00,63,00,61,00,6c,00,53,00,65,00,72,00,76,00,69,00,63,\

00,65,00,00,00

"Description"="@comres.dll,-2451"

"ObjectName"="NT AUTHORITY\\LocalService"

"ErrorControl"=dword:00000001

"Start"=dword:00000002

"Type"=dword:00000020

"DependOnService"=hex(7):72,00,70,00,63,00,73,00,73,00,00,00,00,00

"ServiceSidType"=dword:00000001

"RequiredPrivileges"=hex(7):53,00,65,00,43,00,68,00,61,00,6e,00,67,00,65,00,4e,\

00,6f,00,74,00,69,00,66,00,79,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,\

67,00,65,00,00,00,53,00,65,00,49,00,6d,00,70,00,65,00,72,00,73,00,6f,00,6e,\

00,61,00,74,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,\

00,00,00,00

"FailureActions"=hex:80,51,01,00,00,00,00,00,00,00,00,00,03,00,00,00,14,00,00,\

00,01,00,00,00,e8,03,00,00,01,00,00,00,88,13,00,00,00,00,00,00,00,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\EventSystem\Parameters]

"ServiceDll"=hex(2):25,00,73,00,79,00,73,00,74,00,65,00,6d,00,72,00,6f,00,6f,\

00,74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,\

65,00,73,00,2e,00,64,00,6c,00,6c,00,00,00

"ServiceDllUnLoadOnStop"=dword:00000001

二，联想笔记本win8无线打不开

win8的wifi一直显示关闭，不管是笔记本机身上的无线开关还是Fn+F5，感觉都没有反应，各种设置里面无线或者wifi也都是灰色，无法打开，其实这时候只要装一个联想特有的电源管理软件（也就是驱动）就可以了（可以去官网找对应笔记本型号的）。我装的还是以前win7的电源管理，感觉win8版的不好用，不存在兼容性问题，即使装的时候有提示！