Are you seeing this error message after installing Trend Micro Cleaner One Pro?
"Please carefully type the correct License Key number."
Whether you've purchased Cleaner One Pro as a standalone product or as part of a bundle with Device Security Advanced or Device Security Ultimate, this guide is tailored to help you resolve the error smoothly and swiftly.
What Happened?
This error typically occurs when your device's country and region settings do not match the location your license key was purchased for. It's a common issue that can happen with any subscription including Cleaner One Pro, whether acquired individually or through various Trend Micro bundles.
Simple Steps to Fix the Error
- Open Computer Settings.
- Select Time & Language.
- Choose Language & Region.
- Pick your current region from the Country & region dropdown.
Note: Changes are saved automatically. - Open Cleaner One Pro.
- Click Unlock Full Version.
- Sign in to your Trend Micro Account.