Hello Subhajit,
I'm John an Independent Advisor and a Microsoft user like you. I'll be happy to assist you today. I understand you have a problem installing Preview Update KB4586853.
If you do not experience any issues with your computer, there is no need to install optional preview updates. I recommend waiting for the next week Patch Tuesday. All fixes in KB4586853 will also be included in new updates next week.
Kindly let me know if this helps or if you have any further concerns.
Sincerely
John DeV
Independent Advisor