Fix Errors
Causes of Windows Defender Update Not Working
Common Problems
Fix Windows Defender Update Not Working
Fix Errors
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Windows Defender Update Not Working
Support Guide
Fix Windows Defender Update Not Working
Causes of Windows Defender Update Not Working
Damaged registry files, malware, viruses, and corrupted data can result in Windows Defender Update Not Working issues. These errors are often caused by improper maintenance of your system. If not fixed, this may lead to severe computer problems.
Common Symptoms
Windows Defender Update Not Working error symptoms can include program lock-ups, slow PC performance, system freezes, startup and shut down problems, installation errors, and hardware failure.
Fixing the Problem
To ensure your PC is error free, it is highly recommended that you download and run the Windows Defender Update Not Working repair tool SpeedyPC. It will fix the problems that can create these errors and prevent new ones from occurring.
Download Windows Defender Update Not Working Repair Tool Download Windows Defender Update Not Working Repair Tool  (5 MB)
*File size: 5 MB, Download time: <1min (Cable/DSL)
Windows Defender Update Not Working
Instructions
STEP 1:
Download & run SpeedyPC.

STEP 2:
Click 'Scan' to search for errors.

STEP 3:
Click 'Fix All' and you're done!

Fix Your Computer Now

Certified for Windows 8, 7, Vista & XP
  7 Comments on "How to Fix Windows Defender Update Not Working"

James C says: Topic: Support 
Problem solved! Thank you SOOO much!

Kim Chow says: Topic: Support 
I tried at least 7 different types of software and this SpeedyPC worked first try. Appreciate it!

ANNE says: Topic: Support 
it solved my problem and a few other errors it found with the scan

Rachel Adams says: Topic: Support 
I had the Windows Defender Update Not Working error forever but this fixed it.

TripleRainbow says: Topic: Support 
What does it mean?!? It means my computer is happy again!

KarateDude says: Topic: Support 
I thought I was going to need to buy a new computer

MelanieS says: Topic: Support 
that fixed it, bless you

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