Windows takes around 20HOURS for INSTALLATION

Hi all,


I had windows8 in my PC but due to some problems that crashed, so i formatted my 'C' dive and tried to install win10 but installing win10 is taking nearly 20hours
1) Bootoption to selection of drive where windows is to be installed -> 1hour
2) Getting files ready for installation -> 15hours
3) Installing updates and remaining -> around 2 to 3hours


even after waiting patiently my windows dosent load, it will showup windows logo and show a blank screen later.
I tried both usb(win10) and DVD(win8), and optical device takes much longer time


My pc specs:
Make: DELL
intel i5 3rd gen
6GB RAM
1TB SATA harddisk
2GB Graphic


I have tried in both Boots, legacy and UEFI, both didnt work


My iso is also not corrupt becase i got it with my laptop and it works fine when i tried it in other pc.


Also my harddisk is working fine because I used ubuntu live os and every thing was working fine(all files are present and are accessable)


SATAoperation is set to 'ACHI'only.


Please help me to solve this , thanks in advance