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Have 5.1 0 Unknown Address Error 550 Error in Windows 7? Take A Look at This Article.
Applies To: Windows 10 | Windows 8 | Windows 7 | Windows Vista | Windows XP


We need to first understand what may cause the pc to work slowly? There are several key words here: virus, evidence files, junk files, registry errors, etc.There are many methods to fix those issues and can be easily searched on the internet, but some of them are complicated which may require you technical skills. When speak of easy ways to resolve common computer errors, today we will present an simple solution -- 5.1 0 Unknown Address Error 550 Repair Tool.


In most situations, 5.1 0 Unknown Address Error 550 issue arises when your pc system is not stable and crucial system files can not respond or starts missing. 5.1 0 Unknown Address Error 550 error occurs if your system is not being maintained regularly. To stop further damage, it is important to repair this error promptly.


There could be various causes of 5.1 0 Unknown Address Error 550 error, including:

  • excessive startup entries
  • registry errors
  • hardware/RAM decline
  • fragmented files
  • inessential program installations, etc

Download the Windows repair tool

Recommend: Windows Error like 5.1 0 Unknown Address Error 550 is easy to fix through applying SmartPCFixer with simple clicks. Download it now and follow below steps to fix the errors, additionally, it could also boost your system speed and optimize PC performance.

File Size: 6 MB
Compatible: Windows XP, Vista, 7 (32/64 bit), 8 (32/64 bit), 8.1 (32/64 bit), 10
License: Free evaluation version. To unlock all features and tools, a purchase is required.
Downloads: 361,927
How to fix 5.1 0 Unknown Address Error 550 automatically?
  • 1. Click below button to download SmartPCFixer.
  • 2. Launch the Smart PC Fixer tool and make a complete scan for your computer.
  • 3. Click [ Fix All ] to get rid of the "5.1 0 Unknown Address Error 550". Download SmartPCFixer here.

How to fix 5.1 0 Unknown Address Error 550 Manually ?
Step 1, uninstall recent installed application:
Choose "Programs and Features" by clicking the Start button, clicking Control Panel, clicking Programs, and then clicking "Programs and Features".
Select a program, and then click Uninstall.
Step 2. Run SFC to fix 5.1 0 Unknown Address Error 550 error.
  • Click "Start" button;
  • Type "cmd" or "Command Prompt" in the searching box, right click the "cmd.exe" in search result, and click "Run as administrator";
  • Type SFC /SCANNOW in the command window;
  • Press ENTER.

Notice: SFC also called System File Checker, it is a tool in windows that enables customers to check for corruptions in windows system files and repair damaged data files.Please do not close this Command Prompt window until the verification is 100% complete. The scan results will probably be shown right after this process is finished.

Step 3, check whether "5.1 0 Unknown Address Error 550" has been fixed.
Run the computer under safe mode, and then you probably get message from system about whether your error being successfully repaired. If not, you should apply next solution -- "5.1 0 Unknown Address Error 550" repairing tool.

Warm Tips
  • You must run as an administrator, no matter what steps you will do about your PC.
  • Depending on your computer windows system, the above steps may be slightly different, but the basic process is mostly the same.