sxssrv.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: sxssrv.dll is a crucial system file for Microsoft Office applications, ensuring smooth document management and printing functions. Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	other	️ Not detected
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	🟡 Not signed	Signature missing. The file may have been modified.
Hash Integrity	ℹ️ Unverified	File Hash protection is missing.
File size	7.2 kb.	7421 bytes.

Hashes:

MD5: 12fdf530704d235521a3ab8583f1f639
SHA-1: 48dd55e0b7b79f67688e2e917d4d1132d4eafbad
SHA-256: 7e3dbec49dea6dea9d92f087b60421aea2876150cd53f7d0494fd7265e00e107
SHA-512: 61a487de6234af9d0ca8aed0229f5f24cc2d0f76d5d9d6e4f38275c9c7d3c66f76f4e7f3c7b5765f9443bf12df62d78c822b32456cba07ddbb042f77f1bf3f08

To fix a sxssrv.dll error without downloading files from risky third-party websites, you must repair your system using built-in Windows utilities. This error typically indicates corruption within the Windows Side-by-Side (WinSxS) assembly framework.

1. Run SFC and DISM Tools

Windows has built-in tools designed to automatically find and replace corrupted system files using an internal cached copy.

Open the Start Menu.
Type cmd.
Right-click Command Prompt.
Select Run as administrator.
Type DISM.exe /Online /Cleanup-image /Restorehealth and press Enter.
Wait for the deployment tool to finish processing.
Type sfc /scannow and press Enter.
Restart your computer after the verification reaches 100%.

2. Use Windows System Restore

If the error started happening recently, you can roll back your system files to a state before the corruption occurred.

Press the Windows Key + R to open the Run dialog.
Type rstrui and click OK.
Click Next in the wizard.
Select a restore point dated before the error first appeared.
Click Next and then Finish to start the restoration.

3. Install Pending Windows Updates

Microsoft frequently pushes updates that replace broken system components and update the WinSxS folder where sxssrv.dll resides.

Open Settings (Windows Key + I).
Go to Update & Security (or Windows Update).
Click Check for updates.
Install all available updates.
Reboot your PC.

If you would like to explore alternative built-in recovery solutions, please let me know:

What specific error message pops up?
Which version of Windows are you using?
Does this error happen during boot or when opening a specific app?

📊 Diagnostics Tool: Verify Your `sxssrv.dll` File

Worried that the file on your PC has been modified by malware? Drop it into the form below. Our script will verify its file size, cryptographic hash (MD5/SHA-1), and check for a valid Microsoft digital signature.

Other versions:
️ sxssrv.dll 10.0.19041.3636 64-bit (x64) | ️ sxssrv.dll 10.0.19041.5438 32-bit (x86)