There are 10 or more different types of keys for Microsoft products. example, VLM, KLM, abc, xyz, oem, etc. I have to admit that still till date I’m not having a proper and reasonable understanding of all these different keys. It would be great if a post could be made on the blog explaining the difference for these keys.
Microsoft Product Key Types
- MAK – This volume license key (MAK) allows multiple activations.
- RTL – This retail key allows multiple activations.
- STA – This setup key bypasses activation.
- VL1 – This is a VA 1.0 key.
- OEM – This is an Original Equipment Manufacturer key that allows multiple activations.
- AAA – This retail key is for AA* programs and allows one activation. These keys are issued in batches.
- AAL – This lab use key is for AA programs and allows multiple activations.
- AAM – This is a multiple activation key for AA program customers.
- AV1 – This volume license key (VA 1.0) is for AA programs and allows multiple installations.
- AV2 – This volume license key (KMS) is for Academic Alliance programs.
*AA = Academic Alliance
Windows 7 Product Keys
There are 4 types of retail consumer keys for Windows 7:
- Retail key: This key comes with a retail box or download copy of Windows 7, and can be used for a clean install or upgrade.
- Retail Upgrade key: This key comes with a reduced-price upgrade only version of Windows 7 & can be used for upgrade only.
- OEM COA Non-SLP key: This is the regular OEM key without the special BIOS check. This type of key is provided with copies of Windows marked for purchase with a new PC only.
- OEM SLP key: This key is used for OEM computers that use BIOS-locked activation, used by large PC manufacturers.Source