One of the most popular methods for installing Windows 7 without a CD is by using a USB drive. This method requires a few things:
Microsoft no longer provides official direct downloads. You may find legitimate images on Archive.org or through the Windows ISO Downloader tool.
Here's how to install Windows 7 from a network location:
Now that your USB drive is ready, move to the computer where you want to install Windows 7.
After the installation finishes, you will be guided through the final setup screens:
Is your old computer running slow? Do you need to reinstall Windows 7 but can’t find your installation disc? Or perhaps you have a modern laptop or netbook that doesn’t even have a CD drive?