To install DOS 7.1, I spent nearly two weeks on it and reinstalled the system four or five times. Today I finally got it installed. So that other people won’t have to take the long way around, I’m posting my experience here for everyone’s reference.
After downloading the installation floppies, download a 7.1 boot disk and an image tool as well (http://www.winimage.com/download.htm). Prepare three floppy disks with no bad sectors. After installing the image tool, write the downloaded files onto the floppies. The specific steps are: double-click the extracted file, click OK, and you will enter the image tool interface. There is a floppy disk icon at the top; click it, and you can write what you need onto the floppy. It’s best to format the floppy first. Next you need to reinstall the operating system.
Boot the computer with the boot disk, format the partition where you want to install the operating system, insert the first disk, and enter setup to begin installation. Then follow the menu. Near the end, there will be a prompt like this: Invalid command.com Inter correct name of Command
eg:c:\command). Insert the boot disk and enter the command: a:\command, then you can continue. After installation is finished, install the other operating systems. Note: you must reinstall the operating system, and install DOS first
After downloading the installation floppies, download a 7.1 boot disk and an image tool as well (http://www.winimage.com/download.htm). Prepare three floppy disks with no bad sectors. After installing the image tool, write the downloaded files onto the floppies. The specific steps are: double-click the extracted file, click OK, and you will enter the image tool interface. There is a floppy disk icon at the top; click it, and you can write what you need onto the floppy. It’s best to format the floppy first. Next you need to reinstall the operating system.
Boot the computer with the boot disk, format the partition where you want to install the operating system, insert the first disk, and enter setup to begin installation. Then follow the menu. Near the end, there will be a prompt like this: Invalid command.com Inter correct name of Command
eg:c:\command). Insert the boot disk and enter the command: a:\command, then you can continue. After installation is finished, install the other operating systems. Note: you must reinstall the operating system, and install DOS first


