内容一、win7搜索功能失效解决方案（这里提供了搜索功能亦失效的解决方法，如搜索功能没有失效，即在开始菜单等处搜索可以有正常结果的，可一不管这方面内容直接进入内容二，如果内容二搞完还没解决问题，再转回来好了，不过最好还是从头到尾搞一遍的好，不会有错了）
下面说一下解决方案：
1.win+r,输入regedit，查看一下[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace]，是否有下面三项：(此三项应该是关于window7 搜索相关的注册表项)
a.
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace\{04731B67-D933-450a-90E6-4ACD2E9408FE}]
@="CLSID_SearchFolder"
b.
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace\{4336a54d-038b-4685-ab02-99bb52d3fb8b}]
@="Public folder"
c.
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace\{daf95313-e44d-46af-be1b-cbacea2c3065}]
@="CLSID_StartMenuProviderFolder"
如果都有的话，直接进入2。如果没有的话，将上面的粘贴到一个文本中，并修改后缀名为reg，暂且命名为1.reg。然后双击导入即可。
注意文件的头要写上：
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace]
2.进入[HKEY_CLASSES_ROOT\CLSID\，分别搜索04731B67-D933-450a-90E6-4ACD2E9408FE，4336a54d-038b-4685-ab02-99bb52d3fb8b和daf95313-e44d-46af-be1b-cbacea2c3065。三者都有问题。需要从正常win7系统中相应的注册表中导入相应的项。注意需要将原来有的删除，删除的过程可能需要权限，改为administrators权限即可。正确的注册表导入之后，即恢复了搜索功能。
下面附上正常win7系统导出的三个项的reg文件内容：
a.04731B67-D933-450a-90E6-4ACD2E9408FE.reg：
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\CLSID\{04731B67-D933-450a-90E6-4ACD2E9408FE}]
@="CLSID_SearchFolder"
"LocalizedString"=hex(2):40,00,25,00,53,00,79,00,73,00,74,00,65,00,6d,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,00,53,00,65,00,61,00,72,00,63,00,68,00,46,00,6f,00,6c,00,64,00,65,00,\
72,00,2e,00,64,00,6c,00,6c,00,2c,00,2d,00,33,00,30,00,35,00,32,00,33,00,00,\
00
[HKEY_CLASSES_ROOT\CLSID\{04731B67-D933-450a-90E6-4ACD2E9408FE}\DefaultIcon]
@=hex(2):40,00,25,00,53,00,79,00,73,00,74,00,65,00,6d,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,00,53,00,\
65,00,61,00,72,00,63,00,68,00,46,00,6f,00,6c,00,64,00,65,00,72,00,2e,00,64,\
00,6c,00,6c,00,2c,00,2d,00,33,00,32,00,33,00,00,00
[HKEY_CLASSES_ROOT\CLSID\{04731B67-D933-450a-90E6-4ACD2E9408FE}\InProcServer32]
@=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,00,53,00,65,00,\
61,00,72,00,63,00,68,00,46,00,6f,00,6c,00,64,00,65,00,72,00,2e,00,64,00,6c,\
00,6c,00,00,00
"ThreadingModel"="Apartment"
[HKEY_CLASSES_ROOT\CLSID\{04731B67-D933-450a-90E6-4ACD2E9408FE}\ShellFolder]
"Attributes"=dword:20180000
b.4336a54d-038b-4685-ab02-99bb52d3fb8b.reg:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}]
@="Public Folder"
"LocalizedString"=hex(2):40,00,25,00,53,00,79,00,73,00,74,00,65,00,6d,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,00,73,00,68,00,65,00,6c,00,6c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,\
2c,00,2d,00,39,00,31,00,31,00,33,00,00,00
"SortOrderIndex"=dword:0000004c
[HKEY_CLASSES_ROOT\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\InProcServer32]
@=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,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,00,68,00,\
64,00,6f,00,63,00,76,00,77,00,2e,00,64,00,6c,00,6c,00,00,00
"ThreadingModel"="Apartment"
[HKEY_CLASSES_ROOT\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance]
"CLSID"="{F3364BA0-65B9-11CE-A9BA-00AA004AE837}"
[HKEY_CLASSES_ROOT\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\InitPropertyBag]
"TargetKnownFolder"="{DFDF76A2-C82A-4D63-906A-5644AC457385}"
"Attributes"="0x00000011"
"DescriptionID"="0x3"
[HKEY_CLASSES_ROOT\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\ShellFolder]
"Attributes"=dword:f094010d
"WantsFORPARSING"=""
c.daf95313-e44d-46af-be1b-cbacea2c3065.reg:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\CLSID\{daf95313-e44d-46af-be1b-cbacea2c3065}]
@="CLSID_StartMenuProviderFolder"
[HKEY_CLASSES_ROOT\CLSID\{daf95313-e44d-46af-be1b-cbacea2c3065}\DefaultIcon]
@=hex(2):40,00,25,00,53,00,79,00,73,00,74,00,65,00,6d,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,00,53,00,\
65,00,61,00,72,00,63,00,68,00,46,00,6f,00,6c,00,64,00,65,00,72,00,2e,00,64,\
00,6c,00,6c,00,2c,00,2d,00,33,00,32,00,33,00,00,00
[HKEY_CLASSES_ROOT\CLSID\{daf95313-e44d-46af-be1b-cbacea2c3065}\InProcServer32]
@=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,00,53,00,65,00,\
61,00,72,00,63,00,68,00,46,00,6f,00,6c,00,64,00,65,00,72,00,2e,00,64,00,6c,\
00,6c,00,00,00
"ThreadingModel"="Both"
[HKEY_CLASSES_ROOT\CLSID\{daf95313-e44d-46af-be1b-cbacea2c3065}\ShellFolder]
"Attributes"=dword:20180000
注：1.再次提醒，直接导入的话，会提示无法导入。应该先将原来的键删除，删除的过程中需要修改权限。
（修改权限的方式为在该键上右键--属性--高级--所有者--改为当前用户，当然当前用户必须有管理员权限，即在系统管理员组--返回属性框--显示的控制方框里的允许上都打上勾）
内容二、下面解决的是桌面上win+f或者F3 出现search参数错误的问题
上面两图显示了出错后产生的现象..................
进入注册表HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
寻找子项：{9343812e-1c37-4a49-a12e-4b2d810d956b}，该项数值为Search Home。若无该项则在NameSpace上右键--新建--命名新建那项为{9343812e-1c37-4a49-a12e-4b2d810d956b}--修改数值为Search Home。
将下列内容保存为“*.reg”文件，双击导入注册表
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\CLSID\{9343812e-1c37-4a49-a12e-4b2d810d956b}]
@="CLSID_SearchHome"
[HKEY_CLASSES_ROOT\CLSID\{9343812e-1c37-4a49-a12e-4b2d810d956b}\DefaultIcon]
@=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,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,00,65,00,\
61,00,72,00,63,00,68,00,66,00,6f,00,6c,00,64,00,65,00,72,00,2e,00,64,00,6c,\
00,6c,00,2c,00,2d,00,33,00,32,00,33,00,00,00
[HKEY_CLASSES_ROOT\CLSID\{9343812e-1c37-4a49-a12e-4b2d810d956b}\InProcServer32]
@=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,00,53,00,65,00,\
61,00,72,00,63,00,68,00,46,00,6f,00,6c,00,64,00,65,00,72,00,2e,00,64,00,6c,\
00,6c,00,00,00
"ThreadingModel"="Apartment"
[HKEY_CLASSES_ROOT\CLSID\{9343812e-1c37-4a49-a12e-4b2d810d956b}\ShellFolder]
"WantsFORDISPLAY"=""
"Attributes"=dword:20140000
大家只需拷贝以上内容，另存为reg文件导入系统即可。
关于win7搜索问题，至此此已全部解决。
以上内容系参考此处：http://www.blogjava.net/landon/稍作整理后所得。
