BenQ FP557s User Manual page 22

BenQ LCD Color Monitor User's Guide
11. In the list of CD-ROM, select "Drivers" folder then click "Open" twice, then click "OK",
Select the your LCD Mode (FP557s) from the list in the next window then click "Next" twice.
12. The "Digital Signature Not Found" window will appear, click "Yes", then click "Finish".
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