Sick of windows 8.1's shit (downgrading)

Operating Systems & Open Source Windows
1

I am downgrading cause windows 8.1 has corrupted my account for no reason 2 times and I lost over 450GB of data.My question is does this windows 7 disk come with the key to cause I only have a windows 8 key.Also how hard will it be driver and compatibility wise to downgrade?

http://www.newegg.com/Product/Product.aspx?Item=N82E16832116986

 

2

Yes, that does come with a Windows 7 key.

For drivers and stuff it shouldn't be any different than finding drivers for Windows 8.1.