Could you provide a little more information about where you're getting this message?

For example, is this when you follow a link or bookmarks? Or is it occurring on a tab that Firefox is generating automatically? Or are you creating an XML page and it isn't working in Firefox?

More clues would help. Thanks.

When im trying to Troubleshoot any of my Windows programs )Windows backup in particular) at the end of the Troubleshooting task it says view detailed information...this is the message i receive when i open that report.

When im trying to Troubleshoot any of my Windows programs )Windows backup in particular) at the end of the Troubleshooting task it says view detailed information...this is the message i receive when i open that report.

Is the error message displayed in Firefox or in IE, or in a customized window that doesn't identify the browser?

If it displays in Firefox:

It's possible that the Troubleshooter doesn't work correctly unless IE is your default browser. You could test that possibility by having IE make itself the default and testing the Troubleshooter again.

If it displays in IE or embedded in another Microsoft application:

In a web search I found these suggestions:

(1) Reset your Internet Explorer settings, according to http://answers.microsoft.com/en-us/ie/forum/ie8-windows_7/cannot-view-xml-using-xsl-style-sheet/ccfe80c6-c0db-4594-a7e3-475f9eac0e85

(2) Try the System File Checker, according to http://ask-leo.com/why_do_i_get_the_xml_page_cannot_be_displayed_after_running_a_microsoft_troubleshooter.html

Any luck?