chm文件达不开，怎么办

和微软的安全更新 896358有关。把chm文件改成英文文件名，问题解决……

下面是微软的支持文档。
http://support.microsoft.com/kb/892675

Example 2: Use the MaxAllowedZone entry to enable a security zoneWarning The MaxAllowedZone entry enables all sites in a particular zone. Using the UrlAllowList entry may be safer. If you must use the MaxAllowedZone entry, set the value no higher than is required. If you set the MaxAllowedZone value to 3 or higher, you expose systems to attack from the Internet.

Note By default, the value for the MaxAllowedZone entry is set to zero. The following table summarizes how different entries are interpreted by the value for the MaxAllowedZone entry. MaxAllowedZone Local Machine zone Local intranet zone Trusted sites zone Internet zone Restricted sites zone
0 Allowed Blocked Blocked Blocked Blocked
1 Allowed Allowed Blocked Blocked Blocked
2 Allowed Al