Decryption tools: check applicability first
Free tools may help in some cases; they are not a universal solution.

Three Checks to Start With
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Open fillable checklist ↗Record owners, deadlines and evidence, then download to continue offline or print.
Reference sources
No More Ransom ↗This is an introductory planning checklist. Before making changes, the responsible person should confirm the environment, compatibility and recovery arrangements. Refer to official documentation for detailed steps.