Solution 1:

FYI, I've found this is caused by your printer. Change your default printer to something innocuous like the XPS printer or a PDF printer. FWIW I'm running a network printer (HL-5040) on a CUPS server.

Solution 2:

I found the solution to the problem with Equation Editor in Word and PowerPoint. I think the problem might have something to do with Office 2010 wich was preinstalled on my PC when i bought it.

To solve the problem just download the Microsoft Office Compatibility Pack for Word/PowerPoint/Excel from Microsoft here: Download Office Compatibility Pack

By installing the Compatibility Pack in addition to Microsoft Office 2000, Office XP, or Office 2003, you will be able to open, edit, and save files using the file formats in newer versions of Word, Excel, and PowerPoint . The Compatibility Pack can also be used in conjunction with the Microsoft Office Word Viewer 2003, Excel Viewer 2003, and PowerPoint Viewer 2003 to view files saved in these new formats.