XP to Windows 7 Migration Quick Tech Tips
This is my quick at a glance list of items we all have to do when we upgrade to Windows 7 systems that have been running XP on systems Windows 7 compatible.
Note: Take a look at your hard drive build date and the type.
I would suggest replacing any hard drive smaller than 500Gb and older than 3 years as part of your migration. That old Dell 780 Duo Core 250Gb hard drive is going to be slowing down the computer.
Next: SATA ATA to SATA AHCI or RAID
Disclaimer: Always backup your registry prior to editing.
Be sure your hardware is able to run the AHCI SATA settings. It is basically for the disk cache handling.
I have found if you change it in the BIOS and attempt to boot it will blue screen when it loads the MSAHCI Start=3
My Tip: The fact that you saw the Windows load screen before the blue screen tells me your hardware will most likely work in AHCI. I will ask around to see if others have found something different.
The settings for MSAHCI are only used if you either setup ATA SATA or IDE or AHCI in BIOS.
If you use RAID like most of my systems this registry entry does nothing.
BUT, if you set it up for AHCI now and need to split or break your RAID you are set to fall back to a AHCI drive configuration.
If you migrate like some you'll need to make sure your BIOS settings for your hard drive are set to AHCI SATA and not ATA SATA or IDE SATA.
Look at this registry key and if it has any number other than a 0 you are not using your hardware to it's full design.
Edit DWORD Start
From numeric value to 0
Value = 0
Check the PCIIDE registry entry.
Set the Start Value to 0 as well.
Value = 0
Now shutdown your computer, start and enter BIOS and make the BIOS changes to your system (AHCI)