The Tokens.dat file is a digital log that stores most of the Windows activation files. If this file becomes corrupted, Windows will fail to display any activation information.
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Before fixing the problem, understand the cause. The "Activation Status Not Available" error usually stems from one of four issues: The Tokens
The most common cause is that the background service required for activation has been disabled. Super User Windows Key + R services.msc , and press Software Protection ) in the list. Right-click it and select Properties Startup type Automatic (Delayed Start) to run the service immediately, then click Experts Exchange 2. Reset Activation with SLMGR how to fix windows 7 activation status not available