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I ran into a problem today. I have a HP pavillion dm4 laptop and it was running windows 7. I wanted to install windows 8.1 and used a bootable usb drive. I did custom install and formatted and deleted one partition. But unfortunately the drive was Dynamic and every other partitions were merged into single one. This not the problem coz I think I can recover the data and I have most important data backuped. The problem is that the OS cannot be installed. It shows the following error message:

Windows cannot be installed to this disk. This computer's hardware may not support booting to this disk. Ensure the disk's controller is enabled in the computer's BIOS menu.

I searched for the problem and were some suggestions like setting on the AHCI mode on BIOS. But there is no option for SATA mode in my BIOS configuration. I am in deep trouble.
Please help me.
Thank you.

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So you only have a single disk, and you've blown away all partitions? Are you sure you're not picking the USB drive you're trying to install from? :) –  Ƭᴇcʜιᴇ007 Oct 1 '13 at 18:08
    
@techie007 No the size is showing about 500 GB. This is where I want to install. The USB drive has only 8 GB space. –  Tushar Khatiwada Oct 1 '13 at 18:12
    
@Ramhound It's HP Pavilion dm4-1160us –  Tushar Khatiwada Oct 1 '13 at 18:21
    
I solved this problem but don't know the reason behind it. I clean installed Windows 7 and I created partitions during installation. The installation was successful. After the installation I again tried to install Windows 8.1 and this time there was no such error message. It was also a clean installation process. The installation was successful. What was happening previously? Any Reasons? –  Tushar Khatiwada Oct 2 '13 at 5:18
    
There just isn't enough detail on what you did and what the partition's state were. Too many possibilities, and since the problem went away, not much we can do about it to figure it out. –  Nelson Feb 14 at 9:20

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