7Zip not showing up on right click context menu windows 10 pro

I was able to fix this problem after reading Farstrike post and by uninstalling 7zip 32bit and installing 7zip 64bit. Now all working as normal.
signed up just for this, one thing to check is whether 7-zip.dll exists in the install folder, not to be confused with 7z.dll.

if it's not there then that's your problem! the fix is very easy, open the 7z installer exe any which way, like 7zFM.exe and extract 7-zip.dll to the install folder, that's it!