I came across a still-sealed OEM XP Home SP2 disc, "For distribution with a new PC", but the COA sticker has been removed. What use would that sticker be without the disc, and vice-versa?
First, a Windows XP Home COA label can be used on a different machine with a different copy of Windows XP Home. The Windows Installation software is dependent on having a COA label (at least most of the time). The COA label does not have to have the EXACT Windows Installation disk it can from. There is an exception here. All non-OEM versions of Windows XP (Home and Pro) with Service Pack 3 included on the disk REQUIRE a specific COA for the Service Pack 3 version of Windows XP. Translation: If you try to install Windows XP Pro with Service Pack 3 built in and you type in a COA label number from a Service Pack 1 disk, the installation process will fail.
Second, the Windows Installation disk may still be usable without a COA label. Since you said it was an OEM disk, you should be able to install Windows from the disk onto a system from the SAME manufacturer as the disk and it will NOT ask you for a COA label code. All large PC manufacturers have a "generic" COA label code burned into the Windows Installation disks so that they can quickly produce Windows systems in bulk. Example: If you have a Dell computer and you insert and install Windows XP Pro from a Dell OEM Windows XP Pro Installation CD, when the Windows Installation software sees Dell in the system BIOS, it will automatically use the generic COA label code on the CD and NOT prompt the user for a COA label code.
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