Resetting Highlight Dialogue Box on Adobe 7
This is a fix for ancient versions of Adobe Reader 7.x. When highlighting a scanned document, Adobe will pop up Scanned Page Alert dialogue box asking if it’s OK to perform OCR on the document first.
If you check the Do Not Show Again box, the only way to get the dialogue box back again is to edit the registry.
This key can be found at: HCU\Software\Adobe\Adobe Acrobat\7.0\AVAlert\cCheckbox\
If you remove the iPaperCaptureOfferToRunOCR key then you can get the dialogue box back again.