0x25D ERROR_BAD_COMPRESSION_BUFFER Fix: Corrupt Data in Buffers

1. Corrupt NTFS Compression Metadata (most common)

What's actually happening here is Windows uses a compression attribute on certain files or folders (common on SSDs with compact.exe or after a Windows feature update). When the NTFS volume's compression metadata gets corrupted—maybe from an unexpected power loss or a buggy third-party disk tool—the compression engine reads a buffer that doesn't match its expected format. The OS throws 0x25D because it can't decompress the data.

I've seen this most often on systems running Windows 10 22H2 with BitLocker enabled, after a failed Windows Update reboot. The corruption hits the $MFT compression bits.

Fix: Run chkdsk with repair

1. Open Command Prompt as Administrator (Win+R, type cmd, Ctrl+Shift+Enter).
2. Run chkdsk C: /f /r (replace C: with your affected drive).
3. It'll schedule a check on next reboot. Type Y and restart.
4. After the scan, check if the error persists. If it does, run chkdsk C: /f /r a second time—sometimes one pass misses residual corruption.

The reason this works: /f fixes file system errors, /r locates bad sectors and recovers readable info. It rebuilds the compression state from the on-disk file records. Skip the /r flag on SSDs unless you suspect physical damage—it'll just waste writes.

2. Buggy Storage Driver or Filter Driver (second most common)

Here's a scenario: You're using a third-party antivirus or a disk encryption tool (like Veracrypt, or even some older Intel RST drivers). These drivers hook into the storage stack and sometimes mangle the compression buffer before it reaches the NTFS driver. The error shows up during file copy operations or while launching applications that read compressed files.

I've debugged this on a Dell Latitude 5420 where the Intel Rapid Storage Technology driver version 18.x caused the 0x25D error on a Samsung 980 Pro SSD. Rolling back the driver fixed it immediately.

Fix: Clean boot and driver rollback

1. Press Win+R, type msconfig, go to Services tab, check Hide all Microsoft services, click Disable all. Then go to Startup tab, open Task Manager, disable all startup items. Reboot.
2. If the error stops, enable services in groups of 5 until it returns. That's your culprit.
3. For storage drivers specifically: Open Device Manager, expand Storage controllers, right-click your controller (e.g., Intel SATA Controller), choose Update driver > Browse my computer > Let me pick and select the generic Microsoft driver. Reboot.
4. If you're running Veracrypt: Disable hardware acceleration in its settings (Settings > Performance > uncheck Use hardware acceleration).

The real fix is to identify which filter driver is corrupting the buffer. Use fltmc instances in an admin command prompt to list active filter drivers. Look for non-Microsoft ones—those are your prime suspects.

3. Faulty RAM Corrupting the Compression Buffer

Less common, but I've seen it: a single bad bit in your RAM flips a byte in the compression buffer during a read/write operation. The error appears randomly—sometimes during a file save, sometimes during a backup, never at the same file. If you've ruled out disk corruption and driver issues, test your memory.

This happens especially with overclocked DDR4 or DDR5 systems that pass a quick Memtest86 but fail on longer tests. The compression algorithm is sensitive because it uses lookup tables that must be intact—one flipped bit and the decompression outputs garbage, triggering 0x25D.

Fix: Run Windows Memory Diagnostic

1. Press Win+R, type mdsched.exe, hit Enter.
2. Choose Restart now and check for problems.
3. Let it run the standard test (takes about 20 minutes). If it finds errors, you'll see them in the Event Viewer under Windows Logs > System, source MemoryDiagnostics-Results.
4. If errors show up, remove one stick of RAM at a time until the error stops. Replace the faulty stick.

Skip the quick test—it's useless. Use the extended test (press F1 during the memory test boot) for a thorough check. If you're technical, Memtest86+ from a USB boot will catch errors the Windows tool misses, especially with ECC memory.

Quick-Reference Summary Table

If none of these work, you're looking at a very rare case—maybe a corrupted Windows Imaging Component (WIC) or a virus that hooks compression APIs. In that extreme, repair-install Windows using the Media Creation Tool. Keep the /KeepPersonalFiles switch so you don't lose data.