SWF files in Internet Explorer 7 + 8

If you try to run a shockwave flash file (.swf) from a website in Internet Explorer 7 or 8, it may fail to run and you will only see a blank page with an error icon in the bottom left hand corner of the Internet Explorer status bar.  Downloading and installing the latest versions of Flash and Shockwave players make no difference.

This is due to a security feature introduced by Microsoft in IE7.

To replicate the problem, go to http://www.primaryresources.co.uk/maths/mathsB3.htm then click the flash icon (“f” in a circle) next to Sequences (the third option on the list).

If the flash animation plays then you are not affected by this issue, if you just get a blank page then you are.

There are three ways to get around this problem:

  1. Add the website to Internet Explorer’s Trusted Sites listFor a standalone machine this is easily done by opening IE, going to Tools – Internet Options – Security – Trusted Sites – Sites then type the address of the website in the box and click Add (if the website is not secure, i.e. starts http: rather than https: then remove the tick from the box)On a CC3/CC4 workstation, you will need to add a custom registry entry through RMMC – see below for the relevant articles.
  2. Disable FEATURE_BLOCK_LMZ_SCRIPT in the registry by setting its value to 0.See Microsoft KB934366 for details – you may need to create the registry key before you can disable it (as it says in the KB article, “By default, this registry key does not exist in the registry. However, the feature is enabled.”)
  3. Remove the tick from “Allow active content to run in files on My Computer” under IE – Tools – Internet Options – Advanced – Security.Although this appears to be the exact opposite of what we want to do (we want to enable active content) it does work.To set this in the registry, edit the keyHKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_LOCALMACHINE_LOCKDOWN

    Change the iexplore.exe value to 1.

Further information:

For more information about the Internet Explorer restriction, see http://support.microsoft.com/kb/934366

To add a Trusted Site globally in CC3, see RM Support Knowledgebase article TEC899619

To add a custom registry fragment in CC4, see the Advanced Features section of the CC4 Type Manager release note MDL1256620


Reviewed on 28/08/2015

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Posted in Internet Explorer, RM CC3, RM CC4 and tagged , , , .