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Frequently asked questions

Short answers to frequent questions. Each answer links to the page with the details.

Can I undo a secure erasure?​

No. Overwritten data cannot be restored, not even by O&O Software, and cancelling does not bring back data that is already overwritten. Back up everything you need first; see How secure erasure works.

How can I erase files that I have already deleted normally?​

Clean the free space of the drive. This overwrites the remnants of deleted files and leaves existing files untouched; see Clean free space.

Does cleaning free space delete my existing files?​

No. Only areas that no file occupies are overwritten. To erase a drive including its files, use Erase drives and partitions.

Does the recommendation on the start page mean that data was found?​

No. It only shows how long ago the last secure cleanup was. It does not search the PC and does not start an erasure; see User interface.

Why am I signed out of websites after a cleanup?​

Erasing cookies removes sign-ins. Add the websites you want to stay signed in to under Cookies to keep.

Why does the report show SolidErase instead of the method I chose?​

SSDs are erased with SolidErase when this setting is turned on. The report shows the method actually used; see Erase methods and SSDs.

Which erase method should I use?​

The default method, NIST 800-88 Clear / BSI CON.6, overwrites the data once with random data. That is sufficient for current hard disks. Methods with more passes take much longer; see Erase methods and SSDs.

Does erasing the entire PC also erase connected USB drives?​

Only if you select them. Internal disks are always erased. Use a drive that is not erased for the logs; see Erase the entire PC.

Does a valid erasure record prove that everything was erased?​

It proves that the record is unchanged. Whether every target was erased is shown by the result in the report. Check both; see Verify an erasure record.

Does O&O SafeErase help with the GDPR?​

O&O SafeErase erases personal data so that it cannot be recovered, and documents the erasure with signed records. Which measures your organization needs is up to you; the program does not replace a data protection review.

What can I do with the trial version?​

You can erase files, folders and traces and clean free space. Erasing drives and partitions and Fortress Mode require a license; see Install and activate.

Where is the command-line version?​

OOSafeEraseCmd.exe is in the program folder of O&O SafeErase if the component was installed; see Command line.