Logitech has recently transitioned between software suites. For the ERGO K860, you have two main options:
This is normal. Windows Update might show an error. Do not worry. The generic HID driver is already active. Install Logitech Options+ as described above—it overwrites the generic profile. ergo k860 driver download
If you are on a managed corporate computer, your IT department might require the (MSI package) instead of the standard web installer. Check with your system administrator before downloading. Logitech has recently transitioned between software suites