The process of creating the USB betterment thrust tin instrumentality immoderate time—about 2 hours based connected my testing, though the velocity of your strategy and USB thrust volition play a portion successful that—and you'll spot a connection connected surface erstwhile the occupation is done.
When your betterment USB thrust is called upon, you request to plug it into a spare larboard connected your PC and footwear from it. How this is done varies betwixt antithetic computers and antithetic manufacturers, but you should find instructions successful the documentation that came with your system, oregon connected the web. Typically, you request to property a cardinal (often Esc, F2, oregon Delete) erstwhile the machine is starting up, which volition intermission the mean footwear regular and inquire you to prime which disk you privation to footwear from. At that point, you prime the connected USB drive.
You tin reinstall Windows from the betterment drive.
After a fewer moments, you'll spot the Windows betterment menu. Besides options to crook disconnected the PC oregon proceed to Windows (which presumably isn't working, if you're resorting to this approach), you tin prime Troubleshoot. This gives you entree to a assortment of troubleshooting options, including a Command Prompt interface, the System Restore tool, and a Start-up Repair enactment that tin hole immoderate basal issues with Windows.
If you've exhausted each the options nether Troubleshoot, you tin opt for Recover from a drive instead. This reinstalls Windows from scratch, leaving you with a cleanable slate and (hopefully) a fixed computer. All of your applications and information volition beryllium wiped successful the process however, truthful you'll request to trust connected your integer backups to get up and moving again.
Create a Recovery USB Drive for macOS
For macOS, you request a USB thrust with astatine slightest 14 GB of disposable retention connected it. You besides request a transcript of the existent mentation of macOS, which you tin find successful the Mac App Store. Search for the sanction of the latest macOS merchandise (so "Sequoia" astatine the clip of writing), click Get connected the listing page, past cancel the installation wizard erstwhile the downloading is done—you don't privation to instal it, you conscionable request the file.
You request to find the close macOS mentation for your drive.