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Windows · SpaceSniffer 2.2.0.27

Fix Access Denied During a Scan

Quick answer: Some protected Windows directories reject reads under standard-user permissions.

Use this workflow on an authorized Windows 10 or Windows 11 computer. SpaceSniffer shows a size-proportional view of storage; always inspect the source file in Windows before changing or deleting it.

Step-by-step workflow

  1. Identify the blocked path.
  2. confirm it exists.
  3. reopen as administrator only if authorized.
  4. scan again without modifying ACLs..

How to verify the result

The scan either reads the folder or reports a consistent boundary.

Important limitationNever take ownership of system folders merely to make a treemap complete.

Why this matters

SpaceSniffer is a visualization tool, not a diagnosis of file necessity. The important outcome is an identifiable path and measurable file size, checked against the same Windows volume and with permission to inspect it. If the scan is incomplete, report that limitation instead of treating missing paths as zero bytes.

More targeted troubleshooting

If the result differs from what File Explorer reports, clear the filter field, allow scanning to finish and check the permissions of the specific directory. Repeat on a smaller known folder when you need to isolate a scanning limitation. Always distinguish a changed treemap view from an actual change in free space.

Frequently asked questions

What is the first step for fix access denied during a scan?

Identify the blocked path.

How do I check the result?

The scan either reads the folder or reports a consistent boundary.

What should I avoid?

Never take ownership of system folders merely to make a treemap complete.

Related Windows topics

Sources and further reading

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