OptiPlex 755 with a 240GB SSD and Windows 7

I'm having a problem with a OptiPlex 755 that recently was upgraded with a SSD 240GB,  trying to install Windows 7 64bits.

I know that Windows 7 is not officially supported, but, here is my thing.... I did try installing Windows 7 x32, Windows Vista 64, and Windows XP SP2 and the results are the same. In the first Windows screen the installation stops.

I even try with a SATA Barracuda 150GB and I cannot install the OS in that driver neither.

The logic explanation is that something is wrong with the hardware, however, if I connect the original SATA 250GB HDD with Windows Vista 64, the machine boots correctly.

I was able to start the Windows 7 64 installation in safe mode, and the installation halt (blue screen) when is loading a driver called disk.sys....

Any ideas that could help to install Windows 7x64 in that computer?

Thanks,
moralesrdAsked:
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moralesrdConnect With a Mentor Author Commented:
No.... the RAM and the sockets are perfect.... only was necessary to remove 3 of the 4 memories, then Windows was installed without any issues, once the installation finished, I did install the 3 memories removed and Windows is working without any problem
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Lee W, MVPTechnology and Business Process AdvisorCommented:
I've got several (probably a dozen) 755s running Win7x64 at one client so it definitely works (there is a PCI communications device I can't seem to find a driver for, but other than, it works fine.  Update the BIOS and then double check the settings for the hard drive - if it's set to AHCI, change it - if it's NOT set to AHCI change it to be set (basically, change the setting from what it is now to the non-selected setting).  I do think your probably facing a disk related issue and I just don't recall what the setting is for my client's systems at the moment and I won't be there again until Friday.
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moralesrdAuthor Commented:
Well, I have a OCZ agility and a SanDisk Xtreme both 240GB.... I did upgrade the BIOS to the version A22 (last one). During the different installation attempts, I set AHCI, ATA, RAID and Legacy... with the same result.

I'm not using any additional video card, so is just the main board, the CD/DVD and the SSD HDD... The BIOS detects the SSD drive in any port, SATA0/1/2/External....

Is there any main board hard reset option?
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Lee W, MVPTechnology and Business Process AdvisorCommented:
I don't recall one, but again, I've not had any problems so no need to look for it.  Take some pictures of the errors you're facing and post them.  (camera phone, digital camera, screenshots if you can).
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moralesrdAuthor Commented:
This is the screen that I'm getting during the installation
IMG-20130116-00132.jpg
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Do you have any other devices (USB Card Readers and the like) attached?  Disconnect everything except the hard drive and DVD drive and try installing that way.
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moralesrdAuthor Commented:
The only device connected was the USB mouse.... but, I did solve the problem... at least the installation is working....

I did remove all the memory modules but one.... and everything seems to work now!
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Lee W, MVPTechnology and Business Process AdvisorCommented:
AH, old bad RAM. (or socket)
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moralesrdAuthor Commented:
After testing several configurations this one make it work and solve my problem
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