BSOD; hal.ddl/ntoskrnl.exe/pci.sys Mobile Desktop

OS Name Microsoft Windows 7 Professional
Version 6.1.7601 Service Pack 1 Build 7601
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name USER-PC
System Manufacturer Dell Inc.
System Model Studio XPS 9100
System Type x64-based PC
Processor Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz, 3200 Mhz, 4 Core(s), 8 Logical Processor(s)
BIOS Version/Date Dell Computer Corporation A02, 5/26/2010
SMBIOS Version 2.6
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume3
Locale United States
Hardware Abstraction Layer Version = "6.1.7601.24117"
User Name user-PC\user
Time Zone Eastern Standard Time
Installed Physical Memory (RAM) 12.0 GB
Total Physical Memory 12.0 GB
Available Physical Memory 8.20 GB
Total Virtual Memory 24.0 GB
Available Virtual Memory 18.9 GB
Page File Space 12.0 GB
Page File C:\pagefile.sys

Recently repurposed this desktop to be used on a mobile stand and has been crashing ever since. It boots successfully after a windows repair or opening up the case and messing around with the RAM. Thanks in advance for the help.

There is a problem with the PCI Express Root Port on the mobo. I suggest reinstalling the mobo drivers.