Windows Registry Editor Version 5.00
右键－打开方式－选择程序，无法使用，说拒绝访问。
怎么办？ 我也碰到过这个问题 刚就出现了 不知道怎么导致的 哎呀
搜索了一下 这个方法可以解决
打开记事本 保存为ok.reg运行即可，一般是病毒删除后的关联问题
复制代码 代码如下:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT/Unknown]
"AlwaysShowExt"=""
"QueryClassStore"=""
[HKEY_CLASSES_ROOT/Unknown/shell]
@="openas"
[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
