I messed my BIOS up, need help

The best way to install 8 would be to unplug every hard drive connected to the motherboard.

Then, Connect ONLY the hard drive you want to install 8 on.

Install 8.

Re connect all the hard drives.

Then enter the BIOS and choose which hard drive, (Operating System) you want to boot to.

Either Windows 7 or Windows 8.

Windows 8 is horrible and you really shouldn`t waste your time and money, you`ll only get a headache.

:sick::doh:
 

My Computer My Computer

At a glance

Windows 10 Pro x64Intel Core i7 6700KGSkill TridentZ RGB 16GB 3600 16-16-16-36EVGA GTX 980 Ti SC x2
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Skylake Special #666
OS
Windows 10 Pro x64
CPU
Intel Core i7 6700K
Motherboard
Asus Sabertooth Z170 Mark 1
Memory
GSkill TridentZ RGB 16GB 3600 16-16-16-36
Graphics Card(s)
EVGA GTX 980 Ti SC x2
Sound Card
Realtek High Definition
Monitor(s) Displays
AOC G2460PG
Screen Resolution
1920 x 1080 144Hz
Hard Drives
Samsung 860 Pro 256GB, Seagate Barracuda 4TB x2
PSU
EVGA 1000 P2, EVGA White Custom Braided Cables
Case
Corsair Vengeance C70 Gunmetal Black
Cooling
Corsair H100i v2, Corsair ML120 x2, Thermal Grizzly Kryonaut
Keyboard
Logitech G910 Orion Spectrum
Mouse
Logitech G700s
Internet Speed
Verizon Fios Quantum Gateway 75/75
Antivirus
Windows Defender, Malwarebytes Free 3.8.3
Browser
Chrome
Other Info
Corsair SP120 x4, LG Blu-ray Drive, Durabrand HT-395 100 Watt Dolby Digital Amp, Corsair H2100 Wireless 7.1 Headset
I understand, i haven't had any bad experiences with it yet. i use it on my work computer and me and it have gotten along just fine. Thanks for the help again, everyone has been so nice on here. I will try the suggestions I have been given and get back to everyone.
 

My Computer My Computer

At a glance

Microsoft Windows 7 Professional 32-bit 7601 ...Intel(R) Core(TM)2 Duo CPU T5450 @ 1.66GHz3.00 GB(1) Mobile Intel(R) 965 Express Chipset Famil...
Computer type
PC/Desktop
Computer Manufacturer/Model Number
custom build
OS
Microsoft Windows 7 Professional 32-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM)2 Duo CPU T5450 @ 1.66GHz
Motherboard
biostar P4M900-M7 SE
Memory
3.00 GB
Graphics Card(s)
(1) Mobile Intel(R) 965 Express Chipset Family (2) Mobile
Sound Card
(1) High Definition Audio Device (2) High Definition Audio
Screen Resolution
1280 x 800 x 32 bits (4294967296 colors) @ 59 Hz
Hard Drives
TOSHIBA MK2546GSX ATA Device
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