Disable Diagnostic Telemetry Sweeps

What it changes

Sets the Windows diagnostic data policy to its lowest level, which reduces how often background telemetry tasks run.

Why it helps

• Tasks such as CompatTelRunner periodically scan installed software and drivers, using CPU and disk in the background. With the policy lowered they run less often and collect less.

Trade-offs

• On Windows Home and Pro the lowest level Windows actually honours is "Required". Only Enterprise and Education editions can turn diagnostic data fully off. Treat this as a reduction, not an elimination.
• Some Windows features that depend on diagnostic data, such as the Insider Program, need a higher level.

Requires administrator rights. No restart needed.

Details

• Sets AllowTelemetry=0 under HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DataCollection.
• Revert removes the policy value entirely, so the Diagnostics page in Windows Settings returns to your own choice instead of being locked to a policy.

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Part of Performance Tweaks. This page is the same text as the app's Learn more button, generated from Help/tweaks/telemetry_sweeps.md. To fix something, edit that file (or open an issue); wiki edits are overwritten on the next sync.