About .dll missing issue

Sometimes we run the application and message show "xxx.dll missing".
The article below is an example for how to recovery it and it may be a little complicated.

The easy way is to download .dll from website but it may hide some virus in it.

http://pcsupport.about.com/od/findbyerrormessage/a/comctl32-dll-not-found-missing-error.htm