64bit problem

What about some details? What's your machine? MB, CPU, GPU,..) And any more details on the error massage?

sorry my pc is a dell optiplex 745 with 4.5 gb ram ( 32 bit dont use it all) dual core pentium d 3.4ghz and an asus 5450 hd graphics card. Nothing more on the error message it just says windows cant configure on your machine. sorry should of put all this in the first place.

System requirements:
http://windows.microsoft.com/is-IS/windows7/products/sy...
f you want to run Windows 7 on your PC, here's what it takes:
•1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
•1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)
•16 GB available hard disk space (32-bit) or 20 GB (64-bit)
•DirectX 9 graphics device with WDDM 1.0 or higher driver
.... Looks Like you meet Min requirements.

Just a comment/Question. How is your Ram configured? Is it runing Single or Daul Channel? Daul channel is prefered, Reqires Ram installed in pairs and Pair is made up of equal sized ram.

ADDED
If you still have an operating system on computer you can download the advisor (link Below) and it may identify what your problem is.
http://windows.microsoft.com/en-US/windows/downloads/up...

The only thing I could think of is the disc space. Probably the install partition is to small.

it must be single ram set up as it is a mismacth of what i took from my old pc 2x 1gig 1x2gig 1x 512mb I ran the upgrade advisor and it too said i was compatable. hhmmm

no its not that as i did a full format of my drive and installed on a 80 gig partition but thanks for the intrest m8

Information about upgrading to 64-bit Windows 7
System
Details
Custom installation required
You'll need to perform a custom installation of 64-bit Windows 7 and then reinstall your programs. Make sure to back up your files before you begin.
Go online to get important information about custom installation
20 GB free hard disk space required
You need at least 20 GB of free space on your hard disk to install 64-bit Windows 7.


More info from Dell Inc.


Dell Inc. has a website that might give you more information about getting Windows 7 running on your PC.
Visit the Dell Inc. website
Windows Aero support
Your graphics adapter supports the Windows Aero user interface.
Go online to learn more about Windows Aero
CPU speed: 3.4 GHz
Your CPU meets the 1 GHz minimum requirement.
3.0 GB of RAM
Your PC meets the 2 GB minimum requirement.
this is the upgrade advisor report

Microsoft says this happens if "Your system has an Intel storage controller that is configured to "RAID" mode in the BIOS."

raid mode? so i can go into my bio's and change that can i?
cool ill go look now

i may be being a little dense but all my hard drives say sata and no mention of raid anywhere   think ill sleep on it and try some more tomorrow

In your Bios, set your Hard drive control to AHCI.

im my bio's i have the following options for hard drives
DRIVES
SATA-0 ON/OFF
SATA-1 ON/OFF
SATA OPERATION NORAML/LEGACY

NOTHING ABOUT AHCI AT ALL  
Sorry i know im a pain in the ........lol it even says in bio's under prosessor that it is 64bit!!!! aaaahhhh

NORMAL = AHCI, LEGACY = IDE. Set it to normal if it isn't already.

yeah it was on normal so i guess that wasnt it either   it seems very strange that its not working but thank you all for the suggestions