which which driver i need to download  

hello
i recently bought dell laptop inspiration 15R
i visit dell website found lot's of driver..25-30 driver
can u suggest me which which driver i need to download

Your first port of call should be Device Manager.

If you find any device with a yellow exclamation mark against it then you need to download and install a driver for it.

What I would advise is that you create a backup folder for Dell drivers, download all drivers for your computer and save them in case you need them in future.

thanks a lot :)

You're very welcome.

If you bought a new laptop, the drivers should be already packed on there, unless you reformated or DELL didn't update the drivers.