When i move the mouse to the rightmost and and down of the screen i cant see the mouse pointer why ?
second question how can i clean my LED screen from dust ? is the microfiber cloth a good choice ?
Note: my current OS is Win 8.1 and my monitor is Samsung S19B300B and GPU driver is ok
The thing you have with your mouse is normal. You should only see a slim line of the pointer when going full right, and only a pixel of the tip of the mouse when going to the bottom of the screen.
For cleaning the monitor, use a microfiber cloth, and some screen-cleaning solution, if you can buy some. If not, I used to also use a bit of rubbing alcohol for this, but I`m not sure if that`s recommended.