You may also have problems viewing such content if it is stored on a remote drive and accessed via a UNC share. To resolve the issue, copy the content to your computer's own disk (e.g. the C: drive) before viewing it.
See these links for alternative strategies for resolving the issue:
- http://www.drexplain.com/press/chm-files-the-page-cannot-be-displayed-error/
- http://support.microsoft.com/kb/896054/
Unblocking .chm files
Some .chm files you download from a website are blocked by default.
To unblock them, run Windows Explorer, right-click on the CHM file, and select Properties from the popup menu. Click on the Unblock button immediately below the Advanced button on the General page. Click Apply to show the content. Once the CHM file has been unblocked, the Unblock button disappears.
