Installing Umax Astra 4100 Scanner on Windows 7: A Step-by-Step Guide
Step 5: Verify Installation
If you must use the original UMAX VistaScan software, run Windows 7 as a host but install Windows 2000 or XP inside a virtual machine.
Step 1: Download the Correct Driver Package
If not, search for "UMAX Astra 4100 driver version 4.90" on reputable driver archive sites.