Sounds like you're talking about the checkbox on the website of Adobe. Currently, Unchecky is not able to handle checkboxes which appear on websites.
For more info, please see:
http://unchecky.userecho.com/topic/320753-flashplayer-adobe-checkmark-to-install-macafee-on-the-download-page-is-not-removed/

Closing as duplicate.

This is not an offer of a potentially unwanted program. Therefore, we decided that Unchecky should not handle it.

Closed due to a lack of feedback. If there are still issues, please leave a reply or create a new topic.

This is not an offer of a potentially unwanted program. You are installing a software program, and it suggests to try additional features for a limited time - a legit offer. Therefore, we decided that Unchecky should not handle it.

Will be fixed in the next version of Unchecky.

Unchecky will correctly handle ATubeCatcher in the next version.

The issue should be fixed in Unchecky v0.3.7

We believe that it's no longer an issue.
If you encounter similar false detections again in the future, please let us know.

We believe that Unchecky was falsely detected by some security software, and that it's no longer an issue.
If you still have issues, please let us know.