Honestech TVR 2.5 was primarily designed for legacy Windows systems (XP, Vista, and 7). If you are installing it on a newer OS like Windows 10, consider the following:
Do not pay for a "product key" from a random website claiming to have Honestech licenses. They are either selling free keys or stealing your credit card information. Honestech Tvr 2.5 Product Key
So where is this key supposed to be?
A: Not legitimately. Attempting to bypass activation through cracks or patches is illegal and dangerous. Honestech TVR 2
Follow the on-screen instructions until prompted for the Serial Number or Product Key. Honestech Tvr 2.5 Product Key