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How to Recover Safely After a Windows Security Breach

Issue Description 

After a breach, improper recovery can allow attackers to regain access. 

Common Causes 

  • Incomplete cleanup 
  • Password reuse 
  • Missed persistence mechanisms 

Step-by-Step Solution 

Step 1: Disconnect Immediately 

  • Disconnect from internet 
  • Stop all remote sessions 

 

Step 2: Scan and Clean 

  • Run Defender Offline Scan 
  • Remove all detected threats 

 

Step 3: Change All Passwords 

  • Start with email and Microsoft account 
  • Use unique passwords everywhere 

 

Step 4: Rebuild Trust 

  • Remove unknown accounts 
  • Check startup apps and services 
  • Update Windows fully 

 

Step 5: Consider Reset (If Needed) 

  • Reset this PC (keep files) if compromise was severe 

Explore Further 

  • Restore from known-good backup 

Prevention & Best Practices 

Assume credentials were stolen – rotate everything.