Here are some possible texts you could use to describe this issue:
The infamous "unknown error" message!
Open Command Prompt as Administrator and type: sfc /scannow (Press Enter) the operation cannot complete because of an unknown error
Go to Preferences > Performance and uncheck GPU Performance . Sometimes the "unknown error" is actually a communication breakdown between the software and your graphics card. 5. Solutions for Browser/Web Errors If you see this while uploading a file to a website: Here are some possible texts you could use
Despite its ambiguity, this error usually stems from a handful of underlying issues: the operation cannot complete because of an unknown error