Some basics on RIT/ROT

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@ -68,8 +68,45 @@ license"). This type of license is retrieved through **any** of the following:
* **Microsoft account**
All those above, except the **Machine** type (**TBV**) are subject to RIT and ROT related
effects. (**TODO** Explanation)
effects.
### RIT and ROT
When the hardware ID for the machine for which a license is issued changes, the
license has to be **reissued**. There are two recozniged types of reissues:
* Reissue **In-Tolerance**
* Reissue **Out-of-Tolerance**
In-tolerance reissues guarantee that the license sticks through some number of minor hardware
changes. Out-of-tolerance reissues usually happen for drastic hardware changes, disk transfers
and MSA (Microsoft Account) transfers.
#### Reissue In-Tolerance
When the hardware changes only slightly (or is client-correctable, e.g. by adjusting for RAM)
a Reissue In-Tolerance is triggered and the license's Hardware ID is adjusted
to match the new one.
The "RIT limit", for how many times such a reissue can happen, is currently thought to be
unlimited.
#### Reissue Out-of-Tolerance
When a drastic hardware change is detected and the license no longer matches - a Reissue
Out-of-Tolerance is triggered. The process is roughly the same as for RIT, except the limit
for how many reissues can happen is much lower.
A reissue out-of-tolerance also happens when the same product key is installed on a
different machine, when the license store is moved to a different machine or via a
Microsoft account.
The limit for Out-of-Tolerance reissues likely depends on the following:
* Region (the license's assigned market)
* Product (the licensed edition)
* **Type of license** (Retail / OEM, tolerance a lot lower for OEM)
### Product key
When a valid Windows 10 product key is installed, activation will be attempted.