CPU With out DVD ROM

How can I install an OS to my pc without using DVD ROM.

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Clarification Request
Tell us more.

Why can't you use the CD ROM drive?

Which OS? Which make and model of computer?

As I understand it, it might be possible to install an OS from a USB drive, but if the computer has a BIOS then the BIOS needs to be able to see the external drive as bootable, and needs to be top of the boot order.

Maybe an external CD Drive?


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Two methods

Two methods:

Either you do a network install, or you have to use some kind of external media. That is assuming your motherboard can do either one, and that you have the requisite other materials needed.

In some cases the restore media is installed on a special partition on the HDD, and you can boot right into it from a boot menu in the BIOS. It's different with every company, and sometimes within different lines of the same company, so you'll have to check the online documentation for your system.

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