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Windows 7: Lenovo G50 Win7 Install Problem

13 Jul 2014   #1
Suspekt

XP SP3 / Windows 7 x64
 
 
Lenovo G50 Win7 Install Problem

Hello everybody !

I kinda have a problem as the title states,hope I posted in the right section.My neighbor has a Lenovo G50 she bought and came with windows 8.1 x64 ( which she doesn't like at all and in my opinion win7 is far more superior and simple for her). The thing is I wanted to install her the Windows 7 Ultimate but every-time the " loading files " ends right after it boots from the dvd I get a bsod with the message " The BIOS in this system is not fully ACPI compliant Stop 0x000000A5 "
I tried all kind of different settings through the bios, changed from UEFI boot to Legacy / disabled secure boot / fast boot / I set the ACHI to compatible / but the end result is almost the same ( two times with different settings my screen froze with a red line over the top after loading the files )

My question is what the F is the problem and is there a fix for it? (of course it is,but I don't know it )


Thank you


My System SpecsSystem Spec
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13 Jul 2014   #2
gregrocker

 

Work through the steps for Overcoming Windows 7 Installation Failures - Windows 7 Help Forums.

Does your Lenovo G50 series model have Reset to Defaults vs. Reset to Windows 8 defaults? The former needs to be done after enabling CSM, Legacy BIOS, Legacy Boot first.
My System SpecsSystem Spec
14 Jul 2014   #3
Suspekt

XP SP3 / Windows 7 x64
 
 

Well,it's a lenovo G50 (not the 500) to be more specific Lenovo G50 Laptop | Entry-Level Laptop with DVD Drive | Lenovo (US) but it's enough for her routine web surfing and stuff.

Yes,in the bios it was the option to reset to defaults but I couldn't see no reset to windows 8 defaults, only thing that mentioned the win8 was the " OS optimized defaults " where it was by default set as Win8 x64 and I even tried with the other two ( Win7 or Other OS )
Sadly I didn't see no option to enable CSM and I searched for it
My System SpecsSystem Spec
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14 Jul 2014   #4
gregrocker

 

What are the exact BIOS settings choices for UEFI, Legacy BIOS, Legacy Boot or any related settings? A camera snap would help - attach using paper clip in reply box.

Are UEFI devices still offered on the Boot Menu?

Try the extra steps given to Bypass UEFI to Install WIn7

Between those and the tutorial I gave in my last post, trying every single step should sort it.
My System SpecsSystem Spec
15 Jul 2014   #5
Suspekt

XP SP3 / Windows 7 x64
 
 

Well she took the laptop back because some login issues ( someone made her a stupid microsoft/outlook account ) but didn't tell her the password and couldn't log in ( this after she took out the pin code for the main user ) and apparently the guys from the shop told her that the laptop couldn't be " downgraded " to windows7 ( not sure if is indeed possible but I bet there are workarounds to install it if indeed is the case). I talked on the phone with the guys from the shop and asked them personally about this and if is any " security " stuff implemented to force you to use 8.1 and they kept saying that I won't succeed on changing the windows cause this laptop came pre-installed with it and it forces you to stay on it
My System SpecsSystem Spec
15 Jul 2014   #6
gregrocker

 

Not seen one yet that couldn't be upgraded from 8 to 7.
My System SpecsSystem Spec
17 Jul 2014   #7
celeburdi

Windows 7 Professional x86
 
 

Change usb mode to usb2 and install windows7 from usb pen.
My System SpecsSystem Spec
01 Aug 2014   #8
ExaSpring

Windows 7 Home Premium X64
 
 

I also have Lenovo G50-30. When you try to install Windows 7, you should first change the ACPI setting in BIOS. Default is Version 5. You just change it to Version 4 and the installation will go fine. Also make sure you change the OS optimized defaults to "Other OS". The default is "Windows 8".
My System SpecsSystem Spec
06 Aug 2014   #9
orelsi

Windows 7
 
 

Quote   Quote: Originally Posted by ExaSpring View Post
I also have Lenovo G50-30. When you try to install Windows 7, you should first change the ACPI setting in BIOS. Default is Version 5. You just change it to Version 4 and the installation will go fine. Also make sure you change the OS optimized defaults to "Other OS". The default is "Windows 8".
Confirmed working and also THANK YOU, I spent several days looking for a solution and it was under my nose the whole time. Hell, I made this registration just to say thanks
My System SpecsSystem Spec
06 Aug 2014   #10
gregrocker

 

I mentioned 3 weeks ago that you had to find Reset to other OS defaults in BIOS setup. I have this on my own G500.

Can you tell us what the ACPI settings are. I had not seen these referenced before and it wasn't necessary on my laptop. Was it on yours?
My System SpecsSystem Spec
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 Lenovo G50 Win7 Install Problem




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