The software is sensitive to characters that look alike. Double-check "0" (zero) vs. "O" (letter) and "1" (one) vs. "I" (letter).
Right-click the installer and select "Properties." Under the Compatibility tab, choose "Run this program in compatibility mode for Windows 7." honestechtvr25productkey
Before you look elsewhere, check the physical device itself. Many manufacturers printed the serial number or product key on a sticker attached to the USB capture stick or the CD sleeve. It is often a long string of numbers and letters. The software is sensitive to characters that look alike
If you still have proof of purchase for the capture device, you can try contacting Honestech support directly. They may be able to issue you a replacement key if you can provide details about the hardware bundle you bought. "I" (letter)
Printed directly on the front of the CD-ROM.