: Run the installer and follow the prompts. Restart your PC afterward. Method 3: Third-Party Software (VueScan) HP ScanJet 3770 driver for Windows 10 - Microsoft Q&A

: If the driver fails to install, performing a "clean boot" can prevent other software from interfering with the installation process. Windows Fax and Scan

She went directly to HP’s support site, entered “ScanJet 3770,” and chose Windows 7 64-bit. The file was called SJ3770_64bit.exe . No sketchy sites. No pop-ups.