Error when launching programs get an mshtml.dll

I keep getting an error mshtml.dll error when I try to load my Solidworks 2009 software. I have tried to remove the d,ll or update it however it tells me that I need to be the administrator. I have tried in safe mode to remove it, tried in cmd window nothing.

Can someone point me in a good direction.

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*** Hopeleonie ***IT ManagerCommented:
So you are not an Administrator?
Solidworks 2012 seems to be backward-compatible with XP and Vista and IE8 to 9 (with the exclusion that "Windows Home Editions and Windows To Go are not supported"), but that does not necessarily mean that Solidworks 2009 is forward compatible with Vista.

I couldn't immediately see the Solidworks 2009 system requirements on the official site, but I found another page that infers it is compatible with 32 and 64-bit versions of XP Pro and Vista Ultimate, Business and Enterprise editions  at SP1 or higher):

>>> "I keep getting an error mshtml.dll error" <<<

Exactly what does the error message tell you?

>>> "I have tried to remove the dll or update it" <<<

MSHTML.DLL is an essential Windows system file and it is a protected one.  Even if you do have administrative rights you cannot just delete such a file and expect the software to run without screwing up Windows functionality.  The file may well have been updated by Windows Updates and Security patches over the years.  It requires a proper installer process to do this.  You can't just get another version of this DLL from elsewhere, dump it into the correct system folder, and expect to fix conflicts or incompatibilities that are being caused by one application.

Is this a genuine licensed copy of Solidworks 2009?

If so, I do believe that the best people to address your issue would be the support techs at Solidworks, or you may find some known issues if you post a question in their forums.  It is all too hit and miss for us to start troubleshooting such an issue with so few details about the error.

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