1. Click the 'Start' button then select either 'Computer' or 'My Computer,' depending on the operating system running on the computer (if using Windows Vista or 7 you are able to click the 'Search' option on the 'Start' menu, then type in 'acropdf.dll' to be taken directly to the file location).
2. Double-click the 'C:' drive icon, then choose 'Windows.'
3. Select 'System32' and a window appears with hundreds of different files on the computer.
4. Scroll through the list until you find 'acropdf.dll.'
5. Right-click the file, then choose 'Delete.' A prompt appears, asking if you are sure you want to delete the program from the computer. Click 'Yes' and the file is deleted from the computer system.