Multiple BSODs after installing Windows 7 x64 onto new SSD

Right, I'm confused. Is your existing problem with the 64 bit, or the 32 bit installation?

Stick with the 64 bit installation only.

Re-run the SPTD steps, but be sure to use the 64 bit of SPTD.

Are you getting more BSOD's? If so, please upload the latest dmp file again.

Code:

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Use !analyze -v to get detailed debugging information.

BugCheck 3B, {c0000005, fffff80002da6a20, fffff8800b198080, 0}

Probably caused by : ntkrnlmp.exe ( nt!ObDereferenceSecurityDescriptor+20 )

Followup: MachineOwner
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OK. WinDBG reports a different error than earlier, but unfortunately its inconclusive at this stage. We can try a few things. Firstly, lets check that memory is behaving OK.

Run a minimum of 8 passes, preferably overnight to get a few more passes in, or until errors occur using MemTest86+.

Use this tutorial to help you use MemTest86+:
RAM - Test with Memtest86+

Report back on the results and we will take it from there.