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Hi, i would like to ask if i reinstall my Windows 7, does the product Id & License key change also??I'm not really familiar with software. ^_^

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Quick clarification for : is broadly right — the Windows product key (the 25-character license code printed on the COA sticker or provided with the purchase) does not change simply because the OS is reinstalled. That same key can be reused to activate the same edition of Windows. The confusing number in Control Panel labeled "Product ID" is not the key; it is an install-specific identifier Windows generates after activation and will typically be different after a clean reinstall.

A few important licensing details to keep in mind: the product key is edition-specific (Home/Pro/Ultimate) and must match the media used. OEM licenses are intended to stay with the original PC (tied to the hardware), while retail licenses can be transferred. Volume/enterprise keys use different activation methods (MAK/KMS). Activation checks a hardware signature, so big hardware changes or a blocked key may require phone activation or contacting Microsoft.

Recommended pre-reinstall checklist:

  1. Locate the original product key (COA sticker, original receipt/email, or extract it beforehand with a key-retrieval utility such as Belarc Advisor, Magical Jelly Bean Keyfinder, or NirSoft ProduKey).
  2. Confirm the exact Windows edition and architecture to use matching installation media.
  3. Back up files and drivers and prepare installation or recovery media.
  4. After reinstall, enter the same key during setup or activate online; if online activation fails, use the automated phone activation option.

Notes: reinstalling from an OEM recovery image often restores an already-activated state and may use different internal activation mechanics. Also, Windows 7 reached end of official support on January 14, 2020, so applying current security practices or planning an upgrade to a supported OS is advisable. If activation still fails, Microsoft Support or the PC maker can confirm license status.

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Member Avatar for happygeek

Your license key stays the same...

Member Avatar for Jessica_16

but the product key can change when i reinstall the OS right??

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