Installation fails during Installation on hardware

Question

I downloaded Yosemite but while installing on my hardware "Macintosh HD" I get a message that there problems coming up during the installation and I can do a restart (which now I did for 8 times and I always got stuck when 19 minutes remained of the installation progress)
The list of problems is huge (like over 500 and I don't really know what to do know)
the problem is that I don't have a back up at hand...how can I stop the installation and get back to mavericks?
Best, P.

Answer 1

Hello Trevor -
This reply is conjecture based on facts...I don't think
Win08-64bit is supported.
Facts:
The operating system needs a mechanism for organizing and
managing disk partitions; Windows Server 2008 provides two
partitioning styles: Master Boot Record (MBR) or GUID Partition
Table (GPT).
Master boot record (MBR) disks use the standard BIOS
partition table originally developed for x86-based computer systems
and is the most common style in use.
GUID partition table (GPT) disks use extensible firmware
interface (EFI) originally developed for 64-bit Itanium based
systems (advantages of GPT disks are more than four partitions on
each disk and supports disks larger than 2 terabytes).
Windows Server 2008x86 32-bit and 64-bit systems support MBR
and GPT partition styles. Note: 32-bit systems can only boot from
MBR disk partitions and 64-bit systems can boot from GPT
partitions.
Each partition style has different capabilities and
partitioning styles. The two partition styles have very different
configurations in terms of special mandatory partitions. In
addition, other mandatory partitions are required on each disk
style to operate as boot and system disks. In terms of MBR disks a
master boot record (MBR) partition is required. On GPT disks, EFI
system (ESP) and Microsoft Reserved (MSR) partitions must be
present for the disk to be bootable.
Fact:
The RoboHelp installer writes to the Master Boot Record (it
is by definition a "root kit") where your registration information
is stored.
Conjecture:
The RH installation can fail if:
a) the MBR is write protected (to protect the drive from
viruses and root kits) or
b) the hard drive does not have a Master Boot Record.
Thus, if your 64-bit server uses GPT partitions (you implied
this when you wrote "Windows Server 2008 64-bit") then the RH
installation may fail as there is no MBR to write to.
This is all conjecture on my part. You will need
confirmation/explanation from Adobe developers.
Regards,
GEWB