The driver of Epson R330 printer cannot be installed on WIN764 system, which means there is no valid signature. But it can be installed on win 10 system.

XP system: 1. First, set the system properties. Input method: Start-& gt；; Control panel->; System->; Hardware->; Driver signature button. In the pop-up window, you can see that "Stop-prohibit the installation of unsigned driver software" is selected.

2. Change this item to "Ignore-install the software without my permission", then press "OK", and then press "OK" when you return. Then you can update your driver again.

Win7 system: 1. To enter the "Local Group Policy Editor" for setting, the entry method is: Start->; Run-> Enter gpedit.msc command, and then select: user configuration->; Manage templates-> System->; Driver installation, and then select "code signing of Device Drivers" on the right.

2. After entering the next window, select "Start" at 1 in the figure below, then select "Ignore" at the second place, and then press "Apply" and "OK" to update your driver again.

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