Hi mpbarber:
It’s possible that the original problem with your sound driver occurred after CCleaner Pro’s Driver Updater feature installed a driver that was not compatible with your Lenovo BIOS. The “system recovery” performed by Lenovo tech support might have fixed your sound driver problem by rolling your driver back to a previous version, but Windows System Restore and other system recovery methods that roll back your system files to an earlier date are notorious for damaging third-party software installations if the proper precautions aren’t taken (e.g., if you use a third-party antivirus like McAfee, Norton, etc. and don’t disable the self-protection module of your antivirus before starting the System Restore - see the warning in the Norton support article Fix System Restore Problems With Norton Product Installed for one example). If I were you I would re-open your service ticket with Lenovo customer service since they were the ones who performed the “system recovery”.
If you’d like to continue troubleshooting while you wait for assistance from CCleaner or Lenovo customer support please answer the following questions.
What is your full computer make and model number, and if possible could you provide a link to the Lenovo support page that lists the recommended Lenovo software and drivers that match your computer model? I can’t find any reference to a Lenovo Yoga MS11 if I google that model number or visit the Lenovo site at https://www.lenovo.com/us/en/laptops/results/?visibleDatas=698%3AYoga.
What is your Windows OS and antivirus? If you have a Win 10 or Win 11 OS please include the version and build number shown at Settings | System | About | Windows Specifications [or open a Run dialog box (Windows key + R) and enter winver].
Do you have a proprietary Lenovo utility like Lenovo Vantage that can update Lenovo software and hardware drivers and optimize your system? If so, paying for CCleaner Pro is likely unnecessary, and changes made to your system by CCleaner Pro might even conflict with those made by your Lenovo utility and create unexpected problems.
What is the product name and current version of your Microsoft 365 or Microsoft Office product, and does Word launch correctly after CCleaner Pro is uninstalled? If the problem persists after CCleaner Pro is uninstalled it’s possible an Online Repair (not a Quick Repair) of Office as instructed in the MS support article Repair an Office Application could fix Word.
If you haven’t already done so, I would suggest that you run scans with DISM and System File Checker (SFC) just to make sure your Windows system files weren’t damaged during the “system recovery”. First, open an elevated command prompt with Administrator rights and enter the command DISM /Online /Cleanup-Image /ScanHealth. If that scan does not detect any problems with your component store then run the command SFC /scannow to see if it can detect and repair any issues with your system files. If either of those scans detects a problem post back and let us know what message it displayed. See the ghacks.net article Use DISM to Fix Issues SFC Can’t for more information about these scans. Here are the results of scans I ran today on my Win 10 Pro v22H2 machine:
Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.5011 * Firefox v131.0.2 * Microsoft Defender v4.18.24080.9-1.1.24080.9 * Malwarebytes Premium v5.1.11.133-1.0.5048 * Macrium Reflect Free v8.0.7783 * Microsoft Office Home and Business 2019 C2R Version 2409 / Build 18025.20104 * CCleaner Free Portable v6.28.11297