今天电脑不知道怎么回事，突然双击文件变成了搜索，让我好是郁闷，多方搜索，找到了有效的解决方法，看下方。

Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT/Directory] 
@="文件夹" 
"AlwaysShowExt"="" 
"EditFlags"=hex:d2,01,00,00 
"InfoTip"="prop:DocComments"
[HKEY_CLASSES_ROOT/Directory/Background]
[HKEY_CLASSES_ROOT/Directory/Background/shellex]
[HKEY_CLASSES_ROOT/Directory/Background/shellex/ContextMenuHandlers]
[HKEY_CLASSES_ROOT/Directory/Background/shellex/ContextMenuHandlers/igfxcui] 
@="{3AB1675A-CCFF-11D2-8B20-00A0C93CB1F4}"
[HKEY_CLASSES_ROOT/Directory/Background/shellex/ContextMenuHandlers/New] 
@="{D969A300-E7FF-11d0-A93B-00A0C90F2719}"
[HKEY_CLASSES_ROOT/Directory/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,00,73,00,68,00,/ 
65,00,6c,00,6c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,2c,00,33,00,00,00
[HKEY_CLASSES_ROOT/Directory/shell] 
@="none"
[HKEY_CLASSES_ROOT/Directory/shell/find] 
"SuppressionPolicy"=dword:00000080
[HKEY_CLASSES_ROOT/Directory/shell/find/command] 
@=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,00,45,00,78,00,70,00,6c,00,6f,00,72,00,65,00,72,00,2e,00,65,00,78,00,/ 
65,00,00,00
[HKEY_CLASSES_ROOT/Directory/shell/find/ddeexec] 
@="[FindFolder(/"%l/", %I)]" 
"NoActivateHandler"=""
[HKEY_CLASSES_ROOT/Directory/shell/find/ddeexec/application] 
@="Folders"
[HKEY_CLASSES_ROOT/Directory/shell/find/ddeexec/topic] 
@="AppProperties"
[HKEY_CLASSES_ROOT/Directory/shellex]
[HKEY_CLASSES_ROOT/Directory/shellex/ContextMenuHandlers]
[HKEY_CLASSES_ROOT/Directory/shellex/ContextMenuHandlers/EncryptionMenu] 
@="{A470F8CF-A1E8-4f65-8335-227475AA5C46}"
[HKEY_CLASSES_ROOT/Directory/shellex/ContextMenuHandlers/Offline Files] 
@="{750fdf0e-2a26-11d1-a3ea-080036587f03}"
[HKEY_CLASSES_ROOT/Directory/shellex/ContextMenuHandlers/Sharing] 
@="{f81e9010-6ea4-11ce-a7ff-00aa003ca9f6}"

[HKEY_CLASSES_ROOT/Directory/shellex/CopyHookHandlers]
[HKEY_CLASSES_ROOT/Directory/shellex/CopyHookHandlers/CDF] 
@="{67EA19A0-CCEF-11d0-8024-00C04FD75D13}"
[HKEY_CLASSES_ROOT/Directory/shellex/CopyHookHandlers/FileSystem] 
@="{217FC9C0-3AEA-1069-A2DB-08002B30309D}"
[HKEY_CLASSES_ROOT/Directory/shellex/CopyHookHandlers/MyDocuments] 
@="{ECF03A33-103D-11d2-854D-006008059367}"
[HKEY_CLASSES_ROOT/Directory/shellex/CopyHookHandlers/Sharing] 
@="{40dd6e20-7c17-11ce-a804-00aa003ca9f6}"
[HKEY_CLASSES_ROOT/Directory/shellex/CopyHookHandlers/VPCHostCopyHook] 
@="{8932AEFE-9DB6-4f43-AFB2-5682F55E773A}"
[HKEY_CLASSES_ROOT/Directory/shellex/DragDropHandlers]
[HKEY_CLASSES_ROOT/Directory/shellex/PropertySheetHandlers]
[HKEY_CLASSES_ROOT/Directory/shellex/PropertySheetHandlers/Sharing] 
@="{f81e9010-6ea4-11ce-a7ff-00aa003ca9f6}"
[HKEY_CLASSES_ROOT/Directory/shellex/PropertySheetHandlers/{1F2E5C40-9550-11CE-99D2-00AA006E086C}]
[HKEY_CLASSES_ROOT/Directory/shellex/PropertySheetHandlers/{596AB062-B4D2-4215-9F74-E9109B0A8153}] 
@=""
[HKEY_CLASSES_ROOT/Directory/shellex/PropertySheetHandlers/{5a61f7a0-cde1-11cf-9113-00aa00425c62}]
[HKEY_CLASSES_ROOT/Directory/shellex/PropertySheetHandlers/{ECCDF543-45CC-11CE-B9BF-0080C87CDBA6}]
[HKEY_CLASSES_ROOT/Directory/shellex/PropertySheetHandlers/{ef43ecfe-2ab9-4632-bf21-58909dd177f0}] 
@="" 
////////Folder.reg////////// 
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT/Folder] 
@="资料夹" 
"EditFlags"=hex:d2,03,00,00 
"TileInfo"="prop:Size"
[HKEY_CLASSES_ROOT/Folder/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,00,73,00,68,00,/ 
65,00,6c,00,6c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,2c,00,33,00,00,00
[HKEY_CLASSES_ROOT/Folder/shell]
[HKEY_CLASSES_ROOT/Folder/shell/explore] 
"BrowserFlags"=dword:00000022 
"ExplorerFlags"=dword:00000021
[HKEY_CLASSES_ROOT/Folder/shell/explore/command] 
@=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,00,45,00,78,00,70,00,6c,00,6f,00,72,00,65,00,72,00,2e,00,65,00,78,00,/ 
65,00,20,00,2f,00,65,00,2c,00,2f,00,69,00,64,00,6c,00,69,00,73,00,74,00,2c,/ 
00,25,00,49,00,2c,00,25,00,4c,00,00,00
[HKEY_CLASSES_ROOT/Folder/shell/explore/ddeexec] 
@="[ExploreFolder(/"%l/", %I, %S)]" 
"NoActivateHandler"=""
[HKEY_CLASSES_ROOT/Folder/shell/explore/ddeexec/application] 
@="Folders"
[HKEY_CLASSES_ROOT/Folder/shell/explore/ddeexec/ifexec] 
@="[]"
[HKEY_CLASSES_ROOT/Folder/shell/explore/ddeexec/topic] 
@="AppProperties"
[HKEY_CLASSES_ROOT/Folder/shell/open] 
"BrowserFlags"=dword:00000010 
"ExplorerFlags"=dword:00000012
[HKEY_CLASSES_ROOT/Folder/shell/open/command] 
@=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,00,45,00,78,00,70,00,6c,00,6f,00,72,00,65,00,72,00,2e,00,65,00,78,00,/ 
65,00,20,00,2f,00,69,00,64,00,6c,00,69,00,73,00,74,00,2c,00,25,00,49,00,2c,/ 
00,25,00,4c,00,00,00
[HKEY_CLASSES_ROOT/Folder/shell/open/ddeexec] 
@="[ViewFolder(/"%l/", %I, %S)]" 
"NoActivateHandler"=""
[HKEY_CLASSES_ROOT/Folder/shell/open/ddeexec/application] 
@="Folders"
[HKEY_CLASSES_ROOT/Folder/shell/open/ddeexec/ifexec] 
@="[]"
[HKEY_CLASSES_ROOT/Folder/shell/open/ddeexec/topic] 
@="AppProperties"
[HKEY_CLASSES_ROOT/Folder/shellex]
[HKEY_CLASSES_ROOT/Folder/shellex/ColumnHandlers]
[HKEY_CLASSES_ROOT/Folder/shellex/ColumnHandlers/{0D2E74C4-3C34-11d2-A27E-00C04FC30871}] 
@=""
[HKEY_CLASSES_ROOT/Folder/shellex/ColumnHandlers/{24F14F01-7B1C-11d1-838f-0000F80461CF}] 
@=""
[HKEY_CLASSES_ROOT/Folder/shellex/ColumnHandlers/{24F14F02-7B1C-11d1-838f-0000F80461CF}] 
@=""
[HKEY_CLASSES_ROOT/Folder/shellex/ColumnHandlers/{66742402-F9B9-11D1-A202-0000F81FEDEE}] 
@=""
[HKEY_CLASSES_ROOT/Folder/shellex/ContextMenuHandlers]
[HKEY_CLASSES_ROOT/Folder/shellex/ContextMenuHandlers/BriefcaseMenu] 
@="{85BBD920-42A0-1069-A2E4-08002B30309D}"
[HKEY_CLASSES_ROOT/Folder/shellex/ContextMenuHandlers/{EB4D3CFE-E2AA-4C6E-B2FE-2A749F95D208}]
[HKEY_CLASSES_ROOT/Folder/shellex/DragDropHandlers]
[HKEY_CLASSES_ROOT/Folder/shellex/DragDropHandlers/NBShellHook] 
@="{EB4D3CFE-E2AA-4C6E-B2FE-2A749F95D208}"
[HKEY_CLASSES_ROOT/Folder/shellex/DragDropHandlers/{BD472F60-27FA-11cf-B8B4-444553540000}] 
@=""
[HKEY_CLASSES_ROOT/Folder/shellex/PropertySheetHandlers]
[HKEY_CLASSES_ROOT/Folder/shellex/PropertySheetHandlers/BriefcasePage] 
@="{85BBD920-42A0-1069-A2E4-08002B30309D}" 

把上面的代码保存为.reg格式的文件，然后运行该文件，确定导入。
如果双击变为其他的，比如排序，浏览等等，也可以尝试用上面的方法处理。