Clean install Win7 on refurb Lenovo K450

movement19

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hello,

i just bought this factory refurbished Lenovo K450 desktop i5 4th gen quad core 3.0ghz, 8gb ram, 1tb seagate 7200rpm. it came preloaded with Win8, which not only do i hate, but not all of the software i use is compatible. I make music, edit video and do graphic design, so i use programs like Cubase, Reason, Premier, Vegas, Adobe CS. I am on a seriously tight budget as a full time college student on financial aid and father of 2, so the price for the specs on this refurb was a great deal for me. 500 bucks on ebay.

I have been quite savvy with computers for well over 15 years now. mostly Mac, but for economic reasons i recently made the switch to windows and i have not regretted it. XP and 7 have been good to me thus far. However, I have finally run into something that has seriously stumped me. That is downgrading from 8 to 7.

I am unsure exactly how to set the BIOS. And I'm not sure, do i boot the dvd as legacy or uefi? I know I have to disable secure boot. and set bot mode to legacy right? what else am I overlooking? I keep getting error code 0x80070570. I have to figure out soon whether it is something I'm doing wrong or something wrong with the machine so that i can return it to the seller within 30 days. He swears there is nothing wrong with it and i did run a lot of diagnostics and found it passed in every which way. I do get a blue screen crash that says memory_management.

someone please point me in the right direction. Lenovo won't help me unless i pay them because i downgraded. And the seller tried to help me on the phone but he has a very thick Asian accent and i can not understand a word he says. I can not afford to spend any more money and i hae to be able to get back to work on some serious projects soon.
 

My Computer My Computer

At a glance

Windows 7 Ultimate x64i5 4th gen quad core 3.0 ghz8gbnvidia geforce 630
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Lenovo
OS
Windows 7 Ultimate x64
CPU
i5 4th gen quad core 3.0 ghz
Motherboard
?
Memory
8gb
Graphics Card(s)
nvidia geforce 630
Hard Drives
seagate 1tb 7200rpm
Antivirus
security essentials
Browser
firefox
Well, well... i just figured out how to press f10 and run a lenovo diagnostic. the memory failed! i just emailed the seller and let him know he has a few options. send me new ram, pay the shipping to send it back for him to fix it, exchange it or issue a full refund. thanks anyway y'all. i knew i know what i'm doing. i've been messing with computers for far too long to have been going this crazy simply installing an os!!!
 

My Computer My Computer

At a glance

Windows 7 Ultimate x64i5 4th gen quad core 3.0 ghz8gbnvidia geforce 630
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Lenovo
OS
Windows 7 Ultimate x64
CPU
i5 4th gen quad core 3.0 ghz
Motherboard
?
Memory
8gb
Graphics Card(s)
nvidia geforce 630
Hard Drives
seagate 1tb 7200rpm
Antivirus
security essentials
Browser
firefox
What is the key on the COA sticker on the bottom. Is that a Win7 or a Win8 key.
 

My Computer My Computer

At a glance

Vista, Windows7, Mint Mate, Zorin, Windows 8from 1.6GHz Duo to i7
Computer Manufacturer/Model Number
HP, Dell, Gateway, Toshiba - 4 laptops and 2 desktops
OS
Vista, Windows7, Mint Mate, Zorin, Windows 8
CPU
from 1.6GHz Duo to i7
Monitor(s) Displays
2x HP w2207
Hard Drives
5x HDD, 7x SSD, 12x Externals
Keyboard
with trackball - no mices
Mouse
Trackball mice
Internet Speed
DSL 6000
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