Please reboot your PC in Safe mode and try installing RealPlayer (using the Alternate installer).
To learn how to proceed, please click on the link below and follow the instructions: https://customer.real.com/hc/en-us/articles/231760587
- What Operating System is installed on your computer (Windows XP, Vista, 7, 8, 8.1, 10)?
- What is the exact message that appears on your desktop?
- Please send a screen shot showing the steps you follow and the results. To learn how to take a screen shot, please follow the steps from the article below: https://customer.real.com/hc/en-us/articles/204039473