Vista 64 EVGA 680i SLI MOBO drivers wont install

ok fom the looks of the posts I'm doing better then most. I have a EVGA 680i
SLI mother board. intel 6850 quad core 3ghz cpu, a pair of BFG 8800 ultra WC
cards 4 gigs OCM ram raptor 150 HD. I have (successfully?) installed vista
64. downloaded all the updates. and have started to install the drivers. when
I go to install EVGA's motherboard drivers (for the SLI etc) first it tells
me its Digital Signature is invalid, and if I tell it to run anyway, It goes
staight to an error window saying
__________________________________________________ __
| has
stopped |
|working
|
|
|
|a problem caused the program to stop working correctly. |
|Windows will close the program and notify you if a solution is |
|available
|
| [Close
program] |
-------------------------------------------------------------------------
i managed to get some details ...


Problem signature:
Problem Event Name: APPCRASH
Application Name: nforce_winvista64_15.08_english.exe
Application Version: 4.0.100.1190
Application Timestamp: 3b965ac1
Fault Module Name: nforce_winvista64_15.08_english.exe
Fault Module Version: 4.0.100.1190
Fault Module Timestamp: 3b965ac1
Exception Code: c0000005
Exception Offset: 00008948
OS Version: 6.0.6000.2.0.0.768.3
Locale ID: 1033
Additional Information 1: 8d13
Additional Information 2: cdca9b1d21d12b77d84f02df48e34311
Additional Information 3: 8d13
Additional Information 4: cdca9b1d21d12b77d84f02df48e34311

this act is repeated if I try to install the drivers for my Sound blaster
X-Fi sound card
with slightly different wording.

if any one has any Ideas I would gratly appreciate it. I have already
contacted EVGA about this but have found any answers yet.

thanks