bootstrap.uno.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: Bootstrap Uno DLL - Essential Component for Application Development Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	32-bit (x86)	Compatible with 32 and 64-bit Windows
Creation date	08.10.2025 22:43:47
File version	4.1.9816.500
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	🟡 Not signed	Signature missing. The file may have been modified.
Hash Integrity	✅ MD5: Verified	File Hash protection is missing.
File size	0.6 Mb.	0.6 Mb. bytes.

Hashes:

MD5: 4b030b1d311e850f8cbe2b80f921df75 ✅
SHA-1: fc7c3254f8aa82e3202569fcb357ac569f0c439f
SHA-256: afd62400305713820ec761d6e7a4264e7c93c5b400a523fbb8761dfd031e19d7
SHA-512: dd8c4b32da2f5cd262fae021c32f27c1ab37ad4c929231e810edefff95674051287e757331ebe29ea66db5300c23ac44ac9aa1b901256e03dad18565c9307f57

✅ This file is compatible with 32-bit Windows and can run on ✅ 64-bit Windows (via the WOW64 subsystem).

How to Fix bootstrap.uno.dll Errors Without Downloading Files

To fix the bootstrap.uno.dll error safely without downloading files from risky third-party DLL sites, you must restore the file through built-in Windows repair tools or by repairing the specific application (such as an app built on the Uno Platform, a game, or a development environment) that relies on it.

1. Run Windows SFC and DISM Scan

Windows contains internal system tools that scan for missing or corrupted system framework components and automatically restore them from an authentic local cache.

Open the Start Menu, type cmd, right-click Command Prompt, and select Run as administrator.
Type sfc /scannow and press Enter. Wait for the verification to reach 100%.
Next, type DISM /Online /Cleanup-Image /RestoreHealth and press Enter to fix deeper image corruptions.
Restart your computer.

2. Repair or Reinstall the Affected Software

Because bootstrap.uno.dll is often an application-specific bootstrap file (frequently associated with Uno Platform applications or cross-platform software deployments), the file might simply be corrupted within that software's directory.

Open Windows Settings (Win + I) and navigate to Apps > Installed apps.
Locate the program or game triggering the error.
Click the three dots next to it, select Advanced options or Modify, and choose Repair (if available).
If "Repair" is missing, choose Uninstall, restart your PC, and then run your original official installer to safely reinstall the application and its dependencies.

3. Clear the AppData Cache or Build Artifacts

If you encounter this error while developing software or running an app that builds temporary caches, corrupt cache files can prevent the DLL from bootstrapping properly.

Press Win + R to open the Run dialog box.
Type %localappdata% and press Enter.
Locate the folder named after the application or developer causing the issue.
Delete the temporary cache or obj/bin deployment folders inside it to force the application to recreate the bootstrap file cleanly on the next launch.

4. Restore the File via Windows Recycle Bin

Sometimes the DLL file is accidentally moved or deleted by user error or an overzealous antivirus software quarantine.

Open your Recycle Bin on the desktop.
Search for bootstrap.uno.dll in the top right search bar.
If found, right-click the file and click Restore.
If it was quarantined by your antivirus, open your antivirus protection history, find the blocked item, and select Allow/Restore (only do this if you trust the software explicitly).

📊 Diagnostics Tool: Verify Your `bootstrap.uno.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.

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cppu3.dll
├── salhelper3MSC.dll
├── cppuhelper3MSC.dll
├── sal3.dll
├── reg3.dll
├── xmlreader.dll
├── MSVCR90.dll
├── MSVCP90.dll
└── KERNEL32.dll

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