Hey , this is how to format win 7 without a CD
Things you need to download
uTorrent:from here
choose which operating system you are on :
Windows 7 (64-bit) : https://kickass.so/windows-7-sp1-home...

Windows 7 (32-Bit) : https://thepiratebay.se/torrent/91751...)

Deamon Tools : http://www.daemon-tools.cc/downloads

you need windows loader . no need for it if you have serial number