Hypervisor installation fails after three attempts to complete

Question

My attempts to add the Hypervisor role to a Server 2008 R2 installation on a Dell PowerEdge 310 with a perc 6i/700 raid controller, ends after three reboots with the message, "Three attempts to complete the installation have failed. The installation will
not be attempted again. Please restart the server and try to install the roles, services or feature again." When I add the role again, I get the same error message after three reboots. The installer retracts the installation so there is no role to remove.
I succeeded in installing the dedicated hyper-V server on this exact machine and set up several virtual machines so I doubt there is a hardware incompatibility with the hypervisor role. I succeeded in adding the Hyper-V role on another server (Dell T110)
from the same download of the installation files so I doubt the download is corrupt. The successful installation required 2 reboots. I don't see anything in the ServerManager log that indicates what the problem is.
During the reboot there are things that are supposed to happen, is there a way to find the list and track the activity before I have access to the operating system? I'm feeling there is something minor that's blocking the installation and if anyone has hints
to try I'd appreciate hearing them.
Thanks

Answer 1

I disabled the two drivers and tried to install the Hyper-V roll again. I set Process Monitor to record the boot action during the re-boot during which the error messages appear. The installation failed and about the time the failure message appeared, There
are a lot of "Results" of "Buffer Too Small" or "Buffer Overflow" in reference to registry entries. Some registry entries refer to AMD64 which is not this computer, this has an Intel processor.
These are two sequential Process Monitor entries:
1214448    3:26:18.8703957 PM    TrustedInstaller.exe    992    RegQueryValue    HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SideBySide\Winners\amd64_microsoft-hyper-v-vstack-synthnic_31bf3856ad364e35_none_c32726034e5ef98f\6.1\(Default)   
BUFFER TOO SMALL    Length: 0
the failure is usually followed by an identical entry:
1214449    3:26:18.8704093 PM    TrustedInstaller.exe    992    RegQueryValue    HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SideBySide\Winners\amd64_microsoft-hyper-v-vstack-synthnic_31bf3856ad364e35_none_c32726034e5ef98f\6.1\(Default)   
SUCCESS    Type: REG_SZ, Length: 30, Data: 6.1.7601.17514
This is getting way more interesting than I want to see!