HP Envy 4500 Scan Software Download For Windows 7, 8, 10 / Mac OS, Here you can download free HP 4500 drivers, It can easily resolve printer issues.
I managed to solve the problem,i.e., install OfficeJet 4500a on Windows 7 64 bit. The problem had been caused because I connected the printer before installing the drivers. The problem could not be resolved by using the scrubber to remove the driver. So, I reinstall Windows 7 (hopefully it was a new installation) and, after the windows updates, I tried to install the driver (without having connected the printer) and it was successful! I also tried to install the driver on another WIn7 64 bit machine, which was full of software, so reinstall Windows was not an option. It worked again, i.e., first install the driver and then connect the printer.