我是win7系统。。应用程序双击无效,右键没有“打开”选项。

这个是注册表问题：

1、开始－－程序－－附件－－记事本，在里面输入以下内容：

REGEDIT4

[-HKEY_CLASSES_ROOT\Folder\shell]

[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_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell]
@="none";磁盘驱动器
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Directory\shell]
@="none";文件夹

　　2、按ctrl+s保存，输入文件名1.reg，保存类型选择所有文件，点击保存；

　　3、双击1.reg，点击确定添加到注册表，重启即可。

分析原因：快捷方式的打开方式被病毒等修改了！
将下面的代码保存为 .reg 然后双击运行，选择导入即可！
保存方法：你复制那些代码后 在桌面新建一个 文本文件，打开这个文件，然后将代码粘贴进去，然后 点文件——另存为 选择 类型“所有文件”，然后文件名输入 123.reg，保存即可！

———————以下为代码———————————————

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\.lnk]

@="lnkfile"

[HKEY_CLASSES_ROOT\.lnk\ShellEx]

[HKEY_CLASSES_ROOT\.lnk\ShellEx\{000214EE-0000-0000-C000-000000000046}]

@="{00021401-0000-0000-C000-000000000046}"

[HKEY_CLASSES_ROOT\.lnk\ShellEx\{000214F9-0000-0000-C000-000000000046}]

@="{00021401-0000-0000-C000-000000000046}"

[HKEY_CLASSES_ROOT\.lnk\ShellEx\{00021500-0000-0000-C000-000000000046}]

@="{00021401-0000-0000-C000-000000000046}"

[HKEY_CLASSES_ROOT\.lnk\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]

@="{00021401-0000-0000-C000-000000000046}"

[HKEY_CLASSES_ROOT\.lnk\ShellNew]

"Command"="rundll32.exe appwiz.cpl,NewLinkHere %1"

[HKEY_CLASSES_ROOT\lnkfile]

@="快捷方式"

"EditFlags"=dword:00000001

"IsShortcut"=""

"NeverShowExt"=""

[HKEY_CLASSES_ROOT\lnkfile\CLSID]

@="{00021401-0000-0000-C000-000000000046}"

[HKEY_CLASSES_ROOT\lnkfile\shellex]

[HKEY_CLASSES_ROOT\lnkfile\shellex\ContextMenuHandlers]

[HKEY_CLASSES_ROOT\lnkfile\shellex\ContextMenuHandlers\Offline Files]

@="{750fdf0e-2a26-11d1-a3ea-080036587f03}"

[HKEY_CLASSES_ROOT\lnkfile\shellex\ContextMenuHandlers\{00021401-0000-0000-C000-000000000046}]

[HKEY_CLASSES_ROOT\lnkfile\shellex\DropHandler]

@="{00021401-0000-0000-C000-000000000046}"

[HKEY_CLASSES_ROOT\lnkfile\shellex\IconHandler]

@="{00021401-0000-0000-C000-000000000046}"

[HKEY_CLASSES_ROOT\lnkfile\shellex\PropertySheetHandlers]

[HKEY_CLASSES_ROOT\lnkfile\shellex\PropertySheetHandlers\ShimLayer Property Page]

@="{513D916F-2A8E-4F51-AEAB-0CBC76FB1AF8}"