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03-24-2013

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Can't dual boot windows 7 with windows 8 on Thinkpad edge S430

2014-02-06, 19:22 PM

I am desperately trying to install windows 7 from USB.

I need it to dual boot with windows 8.

I obtained a windows 7 iso from MSDNAA: (en_windows_7_professional_with_sp1_x64_dvd_u_676939.iso)

I made a bootable UEFI USB with rufus on a Sandisk U3 Cruzer (8GB)

Now in BIOS I disabled secure boot  but I can't select my USB, I can select it, press enter, the screen flickers but jumps back to the first entry in the boot list.

The USB is displayed without "UEFI:" in front.

Selecting "legacy" in boot mode works but I can't install windows 7, the setup shows al the partitions but says: "Windows cannot be installed to this disk. The selected disk is not of the GPT partition style".

That's it, I just can't install windows 7... 

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7908 Posts

01-13-2008

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Re: Can't dual boot windows 7 with windows 8 on Thinkpad edge S430

2014-02-07, 0:17 AM

Hi,

 

I'm not familiar with "rufus".  Here's how I make UEFI-bootable flash drives:  format with a single FAT32 partition.   Use something like 7zip to extract the Windows ISO contents to the flash drive.  That's all.   Boot it in UEFI mode.  You'll have  to disable secure boot and enable CSM support.

 

You might give that a try.  I'm a little suspicious that UEFI bootability is broken if you can boot in legacy mode.  Maybe the drive is NTFS?  That won't boot in UEFI mode.

 

Z.


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18 Posts

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Belgium

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Re: Can't dual boot windows 7 with windows 8 on Thinkpad edge S430

2014-02-07, 7:30 AM
I did exactly as you told but to no avail, I just can't select the "USB HDD:"

I mean how hard can it be to install windows 7...
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7908 Posts

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Re: Can't dual boot windows 7 with windows 8 on Thinkpad edge S430

2014-02-07, 16:50 PM

I just verified that this works on my Twist.  Sorry but I don't have any other suggestions.

 

Is there anything elsewhere in BIOS that locks out USB booting?

 

Z.


The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc.


The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored - questions and answers belong in the forum so that others may contribute and benefit. ... GeezBlog

 

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18 Posts

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Belgium

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Re: Can't dual boot windows 7 with windows 8 on Thinkpad edge S430

2014-02-07, 20:02 PM
I tried disabling UEFI, played around with other options but nothing seems to be working...
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18 Posts

03-24-2013

Belgium

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175 Page Views

  • Posts: 18
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  • Message 6 of 6

Re: Can't dual boot windows 7 with windows 8 on Thinkpad edge S430

2014-02-09, 18:52 PM

Ok got it working:

 

a U3 Cruzer is NOT a good bootable USB!

csm should be enabled in BIOS.

secure boot should be DISABLED in BIOS.

 

(My problem was csm and the bad USB)

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