It seems like you are facing compatibility issues with your Acer N311 PDA on your 64-bit Windows 7 PC. Here are a few steps you can try to resolve this issue and get your device to work with your 64-bit Windows 7 system: 1. Driver Installation: - Ensure you have the correct drivers for the Acer N311 PDA that are compatible with a 64-bit version of Windows 7. Sometimes, manufacturers provide separate drivers for 32-bit and 64-bit systems. - Download the latest drivers from the Acer website or from the device's manufacturer. 2. Compatibility Mode: - Try installing the drivers in compatibility mode. Right-click on the driver setup file, go to Properties, Compatibility tab, check the box for "Run this program in compatibility...