Hi, Thanks again.
So, the standard vga drivers are not enough. One has to see the model and go to the website to download the drivers for which card or hardware , the drivers are meant. Simply, put it, if you bought the computer that has hardware supported to a particular OS, you have to download the drivers for the same OS, and make change in the compatibility tab to your previous OS to install the drivers. Otherwise, you get the errors, of Os not supported.