电脑上所有文件右键点打开方式选择默认程序全部提示“该文件没有与之关联的程序来执行操作…”怎么办？

你一定清理过注册表吧，找知困相同系统电脑导入注册表
HKEY_CLASSES_ROOT\Unknown\shell\opendlg\command

将以下内容复制到记事本，然后文件另搭档念存为down.reg，双击aa.reg导入注蠢锋册表。可以在dos中运行命令 regedit 路径+down.reg

Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\Unknown\shell]
@="openas"
[HKEY_CLASSES_ROOT\Unknown\shell\openas\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,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,72,00,75,00,\
6e,00,64,00,6c,00,6c,00,33,00,32,00,2e,00,65,00,78,00,65,00,20,00,25,00,53,\
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,00,4f,00,70,00,65,00,6e,00,41,00,\
73,00,5f,00,52,00,75,00,6e,00,44,00,4c,00,4c,00,20,00,25,00,31,00,00,00

这是说明你的文件在你的电侍肢脑上没有相应的软件可以打开，段山必须得有握谈中软件，这样就可以识别和打开它了。呵呵！你看一下你的文件都是什么格式的。