故障现象： 所有未知格式文件打开的时候，则跳出“该文件拒绝访问”；当点鼠标右键直接选“打开方式”的时候也会弹出“该文件拒绝访问”警告窗口；如果右方已经有部分程序列表，则在点右侧次级菜单中的“选择程序”时跳出“该文件拒绝访问”的警告． 故障诊断： 未知格式文件打开方式关联被恶意修改． 解决方法： 把下面的代码放到记事本中去。

改名为*.reg 文件，双击它就会把信息写进注册表，之后就解决问题了！ Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOTUnknown] "AlwaysShowExt"="" "QueryClassStore"="" [HKEY_CLASSES_ROOTUnknownshell] @="openas" [HKEY_CLASSES_ROOTUnknownshellopenas] [HKEY_CLASSES_ROOTUnknownshellopenascommand] @=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。