Nowadays, given the decline of CDs and DVDs, one of the options we use the most to hard a computer, is to create a USB to install any operating system distributed by image files.
If you want Windows 10, use its tool
If you want to install Windows 10 through a personalized USB flash on a computer, you just have to download Microsoft’s tool to install the new operating system. Remember to keep everything inside it in another location because you will lose all files during the process.
After downloading the tool we recommend you to execute the program as Administrator and after that, we will have two options. The second one tells us to create an installation media for another PC.
Connect the promotional USB you want to use to any available USB port and then you can choose which Windows 10 version you want. If you have problems, 32 Bits version is for a PC whose RAM Memory is lower than 4GB, and 64Bits memory is for computers whose RAM memory is 4GB or higher.
Next, you will see the possibility to select USB flash drive and you may choose among a list of drives which one must be used to install Windows 10 in a custom USB. If you had any problem because it is not recognized, return to the previous step and choose a ISO file.
If the custom USB stick was recognized, you just wait the process to be ended and if not, when the ISO file is downloaded, keep reading the next section.
Other operating systems, use Rufus
Rufus is a tool that may allow us to create a booteable USB flash drive easily: thanks to it we will create everything to allow our PC, instead of starting the hard drive using the installed system, does it from the software we choose to insert in our USB.
We just must download the app from its official website and we can choose two options: installing version and portable version that doesn’t need to be installed. When opening Rufus we will be asked about the online updates and if we allow it to search them.
Although you didn’t introduce the personalized USB memory stick key in an available port of your PC before running the application, if you do so once it is open, it will be automatically recognized and it will be available for its use. In case it does not happen, you should choose any other USB port, try it with another USB memory or even, installing the operating system on a memory card.
When everything is ready you will have to choose which is your memory USB from the list of drives we see at the top of Rufus. Be sure this is the memory you want to use to create a bootable USB stick on Linux or other Operating Systems, because if any other was connected and you chose it by mistake you would lose all your data.
Unless you want to personalize other options (something only recomendable if you know what you’re doing), you shold click on New tag. There, you can specify a name for the USB, which will be shown once you connect it to another computer to facilitate its recognition.
When the formating options screen appear, first option must be unchecked and the others (3) checked. After, you just have to locate the file containing the operating system you want to use to create a boot disk.
For that end, an option to create a boot disk will apear on the menu, click on the right square containing a CD and a drive. There you will have to choose the ISO image file or another supported format.
When the process is finished the USB memory stick will be ready and it may be used to repair other computers or format the PC without a CD.