While I am still searching for this problem, I want to share it here so if someone can support and can give me a detailed answer.
First-thing-first, I am on a low-end desktop PC, and I am not sure if the reason behind this problem is my low-end PC or Microsoft Windows 10.
Yesterday I switched to Microsoft newly launched Windows 10 on my desktop PC which I am using since last few years regularly only for Office Work, particularly for Microsoft Office documents. I do know that it has only 256MB of graphics memory but I thought to give Windows 10 a chance to operate my PC. The upgrading process from Windows 7 (32bit Home Edition) to Windows 10, was itself so smooth and interesting that I feel its something special from Microsoft this time, and yes it is.
Why I am talking only about graphics memory of my PC because Microsoft didn't mention any thing about required graphics card of amount of memory (as far as I read about it), and my RAM and Processor is enough sufficient to operate Windows 10 as per their requirements. After successful installation and upgrade to Windows 10, I got some annoying issue (and the only issue) that I cannot give it a name (technical name) which I thought to share with you so if I will get some idea what technically it is.