I have an XPS17 MLK using Windows 7. I tried unsuccessfully to instal Omnipage 18 (OCR software). Nuance, the manufacturer has also tried unsuccessfully. Nuance instructed me to instal 6 versions of Microsoft Visual C - some repaired what was already installed. I now have no idea whether I should keep all these versions and leave well enough alone or should I uninstal them. And I am not sure how to identify the ones that should be uninstalled. Is anyone able to advise please?