Hi, my name is Jose. I'm an Independent Advisor and a Windows user like you. I'm happy to help you.
Please try using CMD app. If that doesn't work, you need to scan the disk to fix any issue related to the file system.
Please, open the parent folder where the target folder is located. In the address bar type CMD and press enter. The CMD will open in the parent folder path. Then close the file explorer. In CMD type: REN currentFolderName NewFolderName and press enter.
If that doesn't work, go to my pc, right click the disk and select properties. Select tools tab and clickcthe check button.
When the scan is done, try again to rename the folder.