Windows 10: Defender's offline DB size remains mostly the same?!

Something curious I've noticed, and I wonder if someone from Microsoft could shed more light.


Defender's virus database size remains mostly the same over time. It might grow gradually for a while, but then the size drops. Then it resumes growing.


The db is composed of base + delta files. I could see how merging the two might decrease the size, but not how the base db could shrink. On average over a few years, it roughly keeps the same size.


Assuming new virus signatures are being added and none removed, how is that possible?

:)

 

My Facebook Chat remains offline

• My facebook and google contacts remains offline in my phone instead of a good internet connection and the settings switched to available and recommended one.
  
  I have already tried most of the suggestions posted in the community related to the very problem, but unfortunately none of them are working.
• I am also unable to switch my facebook chat in live messenger to online; however the problem is not with the Google chat in the live id.
  
  I can switch my Google chat to online and offline as many times I want, but can't do the same with my Facebook chat.
• kindly give me a working suggestion.
  

 

Windows Defender Offline for Windows 10

Tried this suggestion and it did not work. Tried to boot from USB with Windows Defender Offline transferred from a safe computer. Would not boot from USB. Message "Secure Boot Violation, Invalid Signature Detected, Check secure boot policy in Setup"
Any suggestions on next steps for a Windows 10 compatible version of Windows Defender Offline?

 

window defender

• • • 
      You will want to print these instructions for offline reference -
      

IMPORTANT => DON'T SKIP ANY STEP perform all Steps in one uninterrupted session - If a Step says to reboot
reboot.

Problems starting Windows Defender in Windows 8/8.1/10

Pləase let us know what fixes the problem or if the pяoblem remains.

• • • 
      `~`