Here's the problem I have wrestled with for a very long time. Long story short, my PC got some malicious stuff which I tried to remove with program called Malwerebytes. Final result of that it destroyed Windows important registry files and all I got is Windows 10 boot cycle loop forever. In other words Windows doesn't start anymore.
I've tried to create a boot usb with High Sierra that I could run repair install. I have ISO file downloaded from Microsoft and I've been trying couple of online instructions how to make boot usb with Mac High Sierra.
They have not worked though and best I get is blinking cursor on my PC screen when I try to boot from usb. Has anyone succeeded in creating PC bootable Windows usb with High Sierra? Help is urgently needed because my PC contains important work stuff that needs to be recovered. I have made bootable Win10 installers a couple of times in the last month. I use the BootCamp Assistant, which you say does not work for you.
Now, Windows can be installed without actually using any external medium. Source: Boot Camp In El Capitan No Longer Requires USB Drive To Install Windows| Redmond Pie. How do i create a bootable usb drive for installing hackintosh with the.iso file of niresh's OS X Mavericks?
I recommend trying the BootCamp assistant again. Get the screen where you can select Tasks - should be the second screen after BCA launches.
Uncheck choices so that ONLY 'Create a Windows 7 or later version install disk' is selected. This is assuming that you have access to a downloaded Windows 10 ISO, and that you have the USB drive that you want to use for the install plugged in to your Mac. I use an 8GB USB flash drive for that.
Browse to your Windows 10 ISO, or just drag that ISO to the ISO source line. Your USB drive should already show as the destination, so click Continue. Wait for that to finish. (My flash drive takes about 30 minutes, so be patient) Boot Camp should ask for your admin password at the completion.
You can just Quit Boot Camp Assistant. And, there's your completely Win10 installer drive, all ready to plug in your PC and boot. You probably have to check in the PC's BIOS to make sure that the BIOS supports booting to a USB device (I can't help you with that!) If Boot Camp does not work for you - does it finish making the USB drive from your downloaded ISO? Do you get some kind of error? If all is OK until you try to boot the PC - do you need to use the boot manager for booting to USB? Again, double-check the boot options in the PCs BIOS setup screens, make sure that USB booting is supported (and enabled, if necessary). If you have the ISO, get a flash drive at least 8GB like others have stated.
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Open terminal and type 'diskutil list' and get the disk identifier for your flash drive. It will be listed next to the current name of the drive and whatever size it is. It will say like 'disk 2' or 'disk 3.' Just make ABSOLUTE SURE you get the correct one. If you would like, post a screenshot of your results so we get the right thing. Next, type 'diskutil unmountdisk diskX' followed by 'sudo dd if=PathToWinISO of=/dev/diskX' where diskX is what you identified above. Also, after 'if=' you can drag the ISO into the terminal window and it will fill out the path for you.
This will take a while, so let it run until you see it say completed and some stuff about how long the transfer took. If you have the ISO, get a flash drive at least 8GB like others have stated. Open terminal and type 'diskutil list' and get the disk identifier for your flash drive. It will be listed next to the current name of the drive and whatever size it is. It will say like 'disk 2' or 'disk 3.' Just make ABSOLUTE SURE you get the correct one.
If you would like, post a screenshot of your results so we get the right thing. Next, type 'diskutil unmountdisk diskX' followed by 'sudo dd if=PathToWinISO of=/dev/diskX' where diskX is what you identified above. Also, after 'if=' you can drag the ISO into the terminal window and it will fill out the path for you. This will take a while, so let it run until you see it say completed and some stuff about how long the transfer took. If you used your Boot Camp assistant to create the bootable USB drive from a Windows ISO, Restart your Mac, holding the Option key. The boot picker screen will appear. Insert your USB Windows installer, and you should see TWO possible boot partitions appear.
One will be Windows, and the other will be EFI Boot. The one that works depends on which Mac you have. Some Macs may need quite some time to respond with that boot to the Windows installer, so give it a few minutes for something to happen. USUALLY, at some point, you will see a screen to 'Press any key to boot from disk'. I think if you ignore that message, the boot will stall, so watch for that screen. It does not appear in all cases, but you should watch for it, so you can press a key.
Or, it will continue on to where you can install Windows, and from there it's pretty straightforward. I ALWAYS choose a custom install, so I can format the Windows partition that boot camp creates. The Windows installer might stall there, too. So after a format, I usually shutdown there, then restart to the Windows installer. And it usually goes through without a hitch.
A bootable Mac OS X thumb drive comes in handy when you need to troubleshoot OS issues for yourself, your family, or your friends. It's also extremely useful for keeping your basic setup consistent across multiple computers, if you find yourself switching hardware regularly; and I've had fun in the past setting up a bootable USB keychain loaded with all the apps and files I need to turn any Mac-compatible computer into a viable media center quickly and easily. With Mac OS X Lion and a new piece of free software, it's easier than ever to create a USB keychain that you can boot from. All you need is a few minutes, a copy of Lion, and a USB flash drive with at least 4GB of storage (though more is preferable). Preparation The first step in getting Lion onto your USB drive is to obtain a copy of the OS itself. Unfortunately, the file you download from the Mac App Store to your computer deletes itself after you update to Lion, so you'll probably need to redownload the OS update. This is a simple but slightly time-consuming process.
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Go into the App Store application and open the Purchases tab at the top of the screen. From there, you should see OS X Lion as one of your previous purchases. Click the Download button next to Lion, note the directory that it downloads to and wait for the download to finish. During testing it took me about 50 minutes to redownload the 4GB or so of content that comprises Lion.
Once the OS has finished downloading (and you've verified that Lion has landed safely in your Applications folder), you're ready to transfer it to your trusty USB flash drive. If you already own a copy of OS X Lion, you should be able to download a fresh copy at any time from the Purchases tab of the Mac App Store. To streamline the process, download the free app. Downloading a third-party app just to handle this process is a bit of a bother, but Lion Discmaker enormously simplifies the process of installing Lion on a USB keychain. Now, before you start formatting your drive, back up anything currently on your flash drive that you'd like to keep-because this process will completely erase the contents of the USB drive and rewrite it with a copy of Lion. You have been warned! Creating Your Bootable Drive Lion DiscMaker makes this part of the process a snap.
Start the Lion DiscMaker app with your USB flash drive plugged in and with the Lion install file sitting inside your application folder. The app will give you the option of creating a bootable drive out of either a DVD or a USB keychain. Select the USB keychain option. (If you happen to own a Mac with a disc drive, consider creating a DVD backup of Lion.
I prefer keeping Lion on a USB keychain so that I can add files to the USB drive to customize the installation; but if you're just looking for a bootable copy to troubleshoot your hardware, feel free to go with the DVD option and save yourself a little cash.) Lion DiscMaker makes it easy to create a bootable thumb drive. Once you've indicated that you want use a bootable drive, the app will ask whether you'd like to use a USB thumb drive or some other kind of disk. Select the USB thumb drive option again; and when prompted, choose the disk that you'd like to install Lion to. Select your flash drive and you should be ready to rock. If you're using a thumb drive that has only 4GB of free space, Lion DiscMaker will remind you that you won't get a complete of OS X Lion package because there won't be room for the 'additional speech voices' package. This should be no great loss.
Select Okay and then, to confirm that you're aware the volume will be erased, click the Erase then create the disk button. The copy procedure will take a few minutes and will open a few windows in your finder automatically, but Lion Discmaker should automate the whole process. All you have to do is wait for your Mac to cease displaying its 'Copy in progress, please wait.' Message, which will indicate that DiscMaker has finished installing Lion onto your flash drive.
Once that's done, you'll have a bootable USB flash drive that fits in your pocket and can handle system recovery, OS installation, and even basic Web browsing in a pinch. If you have any space left over on your flash drive, you can add a few of your favorite applications and files, to customize a new installation. Regrettably, these files won't be accessible when you boot directly from the USB flash drive; but once the installation is finished, they can help you save considerable time while setting up a new computer. Of course the bootable drive that this method creates is no substitute for a fully customized Mac OS X Lion-based computer, but considering how fast and easy the drive is to set up-and how much time it could save you the next time you need to reinstall or troubleshoot your Mac OS X-there's no good reason not to make your own bootable copy of Lion to carry in your pocket.