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<meta name="description" content="VeraCrypt is free open-source disk encryption software for Windows, Mac OS X and Linux. In case an attacker forces you to reveal the password, VeraCrypt provides plausible deniability. In contrast to file encryption, data encryption performed by VeraCrypt is real-time (on-the-fly), automatic, transparent, needs very little memory, and does not involve temporary unencrypted files."/>
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<a href="Release%20Notes.html">Version History</a>
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<h1>Release Notes</h1>
<p>
<strong>Note to users who created volumes with 1.17 version of VeraCrypt or earlier: </strong><br/>
<span style="color:#ff0000;">To avoid hinting whether your volumes contain a hidden volume or not, or if you depend on plausible deniability when using hidden volumes/OS, then you must recreate both the outer and hidden volumes including system encryption and hidden OS, discarding existing volumes created prior to 1.18a version of VeraCrypt.</span></li>
</p>
-<p><strong style="text-align:left">1.25.6</strong> (January 1<sup>st</sup>, 2022):</p>
+<p><strong style="text-align:left">1.25.6</strong> (January 3<sup>rd</sup>, 2022):</p>
<ul>
<li><strong>Windows:</strong>
<ul>
+<li>Restore support of Windows Vista, Windows 7 and Windows 8/8.1.
+<ul>
+<li>Windows 7 support requires that either KB3033929 or KB4474419 is installed.</li>
+<li>Windows Vista support requires that either KB4039648 or KB4474419 is installed.</li>
+</ul>
+</li>
<li>MSI installation only: Fix double-clicking .hc file container inserting %1 instead of volume name in path field.</li>
<li>Advanced users: Add registry settings to control driver internal encryption queue to allow tuning performance for SSD disks and having better stability under heavy load.
<ul>
<li>Under registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\veracrypt:
<ul>
<li>VeraCryptEncryptionFragmentSize (REG_DWORD): size of encryption data fragment in KiB. Default is 256. Maximum is 2048.</li>
<li>VeraCryptEncryptionIoRequestCount (REG_DWORD): maximum number of parallel I/O requests. Default is 16. Maximum is 8192.</li>
<li>VeraCryptEncryptionItemCount (REG_DWORD): maximum number of encryption queue items processed in parallel. Default as well as maximum is half of VeraCryptEncryptionIoRequestCount.</li>
</ul>
</li>
<li>The triplet (FragmentSize=512, IoRequestCount=128, ItemCount=64) is an example of parameters that enhance sequential read speed on some SSD NVMe systems.</li>
</ul>
</li>
</ul>
<li><strong>MacOSX:</strong>
<ul>
<li>Fix resource files inside VeraCrypt application bundle (e.g. HTML documentation, languages XML files) being world-writable. (Reported by Niall O'Reilly)</li>
</ul>
</li>
</ul>
<p><strong style="text-align:left">1.25.4</strong> (December 3<sup>rd</sup>, 2021):</p>
<ul>
<li><strong>All OSes:</strong>
<ul>
<li>Speed optimization of Streebog.</li>
<li>Update translations.</li>
</ul>
</li>
<li><strong>Windows:</strong>
<ul>
<li>Add support for Windows on ARM64 (e.g. Microsoft Surface Pro X) but system encryption not yet supported.</li>
<li>Add MSI installer for silent mode deployment (ACCEPTLICENSE=YES must be set in msiexec command line).
<ul>
<li>For now, MSI installer cannot be used if system partition is encrypted with VeraCrypt</li>
<li>MSI installer requires Windows 10 or newer</li>