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Open Internet Explorer>

Go to Tools>Internet Options>Advanced (TAB)

You will get few heads like Accessibility, Browsing. Go little down and try to find out either "Microsoft VM" or JAVA "(SUN)" in between "HTTP 1.1 settings" and "Multimedia".

In case both are present,"JAVA (SUN)" needs to be unchecked.

In case only "JAVA (SUN)" is present,it has to be unchecked and "Microsoft VM" needs to be installed (Remember Sun Java alone works but in case it is unable to help you to display preview then this method is useful,otherwise for systems having no problem with Sun Java alone need not require any modification).

In case both are no present,"Microsoft VM" needs to be installed.

In case only "Microsoft VM" is present and still it does not help in displaying preview you will have to reinstall it.

For information:

Options of "Microsoft VM" to be checked

"JIT compiler for virtual machine enabled (requires restart)"
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Microsoft VM is no more available with OS it has to be downloaded separately.I am having MS JVM and it is available in few sites also.But it may be a legal issue to post those site name or make this file available for download in BL site ( I am not too sure) .For individual it does not matter.Information are available in below site.

http://java-virtual-machine.net/download.html

Courtsey: Banglalive Fan Anirban Bhattacharya