OMG is that ever true.....and the damage done cannot be undone save with a backup. If by chance this user did a registry backup before using that, and they seldom do, then they should invoke it now and we can take them the rest of the way.
You need to be certain there are drivers for Windows 7 before even attempting that and frankly if this is a new laptop I would be returning it to where you bought it.
Wow downloading a special installer from Kaspersky seems like a really involved process to go through just to install and Antivrus program, bu that seems to be the only way to accomplish this. Those instructions should be on the software as necessary for using Windows 8.1.
Well this is new to me and I look forward to participating with you, its become a habit.
It is so unreal to have 2 drives go down at once in an array, that must have been a real shocker
and great job retrieving anything frankly.