I am beginning to think that it is impossible to install Windows 7 Ultimate 64-bit on a system pre-installed with Windows 8. I have done several of the steps that the process requires yet I still am halted at the installation menu by a message that states Windows 7 cannot be installed on the partition because it is GPT format. I went into the BIOS and disabled the UETI secure boot. I put it in Legacy and reboot in that mode. System recognizes the DVD and setup begins installation but the fact the the partition I set up is in GPT format, I can't doing anything else. It's not compatible with the version of Windows that I am trying to install. I know that Windows 7 uses a different format, but I don't know how to resolve my issue. I do not want to uninstall Windows 8 from the system because it was pre-installed when I bought the machine. I even went so far to look for the product code of the version that was already loaded on my computer, but it doesn't give me the full code, just xxxxxxxx- and the rest of the code. I don't feel secure uninstalling Windows 8 and reinstalling after doing Windows 7, so my question is: What can I do to get Windows 7 installed on my Windows 8 machine. I have successfully installed Windows 7 via VMware, but I'd prefer to have it on my physical system; some programs do not run well with virtual machines. Please help me.
I don't even have the advanced option to enable CSM. I can only change the boot mode from UEFI to Legacy (which I am thinking affects the CSM settings anyway), and when I do that, it does allow me to boot from my windows 7 disc but I still get the message that the drive is in GPT partition style and windows cannot be installed. The 'next' button is grayed out. I chose the custom install and everything. Space is not a problem. I shrunk the volume that windows 8 is on already and then had that 'unallocated space' and I created a new volume (NFTS) and formatted that. Seems like it should allow me to install, right? I have the secure boot disabled already and everything. I am considering backing up my system with Acer Recovery and swiping my drive so that I can install win7 on the drive first, then go back and restore win8. I am just wondering how safe that is though. I'm aware that the win8 product key is in the bios so activation shouldn't be a problem, but do I need a win8 disc in order to put it back on my system after installing win7? I don't have one since it was pre-installed and I don't believe a retail version would work, idk. I'm still working on this...
Thank you, @ben_berg! After changing BIOS to Legacy and disabling the Secure Boot, I was stuck at the part where Windows 7 installer disk wouldn't install on the GPT type disks. I was really upset, because I have already tried to format the discs via the installer and thus erased Windows 8 and was therefore left with no OS.
Luckily, I found this post, followed the steps and changed the disk to MBR via command line and it worked!
The whole process seems complicated. Question: if I install Windows 7 along with the pre-installed Windows 8 in dual-boot mode, will I lose the guarantee of the laptop? ACER told me that if I modify the O/S I would lose the guarantee, but does this also include a dual-boot?
I have a ACER Aspire V5-571PG with i3 and 500 gb hard disk. How can I install Windows 7 64 bit Ultimate Edition in dual boot in a simple way?
I also have 2 partitions: a C:\ partition with about 250 gb (80 gb free) and a D:\DATA partition with about 230 gb (120 Gb free).
I also heard of a hidden recovery partition in case the system fails. How do I activate it on startup and how do I access the BIOS please?