居民休闲娱乐调查问卷:我电脑里的应用程序EXE被更改，所有EXE都无法打开，有什么办法吗？半瘫了，急！！！！！！！

不用DOS这么麻烦，你只要定位到注册表
HKEY_CLASSES_ROOT\exefile\shell\open\command
把键值改成"\"%1\" %*"。包括引号就行了
或者把下列代码复制到文本里，然后把后缀名改成BAT，运行就行了。这是一个恢复关联的小工具
@echo off
cls
echo Fixassoc.bat,用于恢复bat.cmd.com.exe.pif.scr.txt.ini文件关联
echo.
if %os%==Windows_NT goto reg5
echo REGEDIT4>Fixassoc.reg
goto start
:reg5
echo Windows Registry Editor Version 5.00>Fixassoc.reg
:start
echo.>>Fixassoc.reg
echo [HKEY_CLASSES_ROOT\batfile\shell\open\command]>>Fixassoc.reg
echo @="\"%%1\" %%*">>Fixassoc.reg
echo.>>Fixassoc.reg
if %os%==Windows_NT goto cmd
goto com
:cmd
echo [HKEY_CLASSES_ROOT\cmdfile\shell\open\command]>>Fixassoc.reg
echo @="\"%%1\" %%*">>Fixassoc.reg
echo.>>Fixassoc.reg
:com
echo [HKEY_CLASSES_ROOT\comfile\shell\open\command]>>Fixassoc.reg
echo @="\"%%1\" %%*">>Fixassoc.reg
echo.>>Fixassoc.reg
echo [HKEY_CLASSES_ROOT\exefile\shell\open\command]>>Fixassoc.reg
echo @="\"%%1\" %%*">>Fixassoc.reg
echo.>>Fixassoc.reg
echo [HKEY_CLASSES_ROOT\piffile\shell\open\command]>>Fixassoc.reg
echo @="\"%%1\" %%*">>Fixassoc.reg
echo.>>Fixassoc.reg
echo [HKEY_CLASSES_ROOT\scrfile\shell\open\command]>>Fixassoc.reg
echo @="\"%%1\" /S">>Fixassoc.reg
echo.>>Fixassoc.reg
echo [HKEY_CLASSES_ROOT\txtfile\shell\open\command]>>Fixassoc.reg
if %os%==Windows_NT goto txt
echo @="NOTEPAD.EXE %%1">>Fixassoc.reg
goto skip
:txt
echo @=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,\>>Fixassoc.reg
echo 00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,4e,00,4f,00,\>>Fixassoc.reg
echo 54,00,45,00,50,00,41,00,44,00,2e,00,45,00,58,00,45,00,20,00,25,00,31,00,00,\>>Fixassoc.reg
echo 00>>Fixassoc.reg
:skip
echo.>>Fixassoc.reg
echo [HKEY_CLASSES_ROOT\inifile\shell\open\command]>>Fixassoc.reg
if %os%==Windows_NT goto ini
echo @="NOTEPAD.EXE %%1">>Fixassoc.reg
goto end
:ini
echo @=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,\>>Fixassoc.reg
echo 00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,4e,00,4f,00,\>>Fixassoc.reg
echo 54,00,45,00,50,00,41,00,44,00,2e,00,45,00,58,00,45,00,20,00,25,00,31,00,00,\>>Fixassoc.reg
echo 00>>Fixassoc.reg
:end
echo.>>Fixassoc.reg
echo.>>Fixassoc.reg
echo.
pause
start /w regedit /s Fixassoc.reg
del Fixassoc.reg
echo.
echo ****************
echo * 完 成 ! *
echo ****************
echo.
pause
cls

可能是你注册表被恶意修改了……同情ing……

重装系统吧,这样方便也干净!