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When I tried to install Windows XP on a Removable disk like Pen-Drive it says Windows cannot be installed on Removable Disks. Why cant I install XP on my Pendrive

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up vote 1 down vote accepted

eHow: How to Make a Bootable USB in Windows XP.
That gives a short summary of steps and references three other articles,

  1. BayWolf: How to Create a bootable USB Memory Key
  2. Microsoft: How to Create a Bootable Floppy Disk for an NTFS or FAT Partition in Windows XP
    Microsoft Knowledge Base 305595
  3. Tech Republic: SolutionBase: Boot Windows XP from a USB Flash Drive
    this is already linked in another answer here

These tools are typically referred,

  1. HP USB Disk Storage Format tool
  2. Bart's PreInstalled Environment (BartPE)
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Didn't we have a SU question about this as well? – Ivo Flipse Aug 29 '10 at 11:56
@Ivo, I vaguely recall another question that also debated about XP as LiveUSB and Installing XP from a USB. Don't think I can see it in the related list for this one yet. – nik Aug 29 '10 at 12:11

I found this TechRepublic article helpful: Boot Windows XP from a USB flash drive.

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i use a free tool called Novicorp WinToFlash which you can download from here:

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The reason you can't is that Microsoft programmaticly blocked it in the install disc. It's against the EULA to use that copy of Windows on more than one computer.

That said, you can in fact hack the disc to create a PE (Preinstalled Environment). This is basically a read-only version of Windows meant for sysadmin'ing stuff.

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