If you were using a 2011-era Microsoft Office AIO tool, just uninstall the old suite and install . It reads and writes DOCX, XLSX, and PPTX files perfectly. It is completely free, open-source, and receives weekly security updates.
Don't let your SEO efforts disappear.
Stay safe, update your software, and always back up your data before running any legacy executable. toolallinone2011 link