I followed the installation poster to the letter and there was no problem. The ONLY glitch was that as part of the process, a calibration sheet is printed once the cartridges are installed. The next step calls for the sheet to be placed on the scanner.Place the sheet UPSIDE DOWN to make this step work.Yes the software is BLOATED at 1GB! Minimum install requires 100mb. I've not tried ALL the functions yet. It will take me sometime to get there. Pretty quiet, Very fast. Very pleased.