Thanks to Yao-cheng Teng @ http://groups.google.com/group/microsoft.public.sqlserver.setup/browse_thread/thread/3295c74da299d0e0?pli=1
The message I got is:
MsiGetProductInfo failed to retrieve ProductVersion for package with Product
Code = '{A43BF6A5-D5F0-4AAA-BF41-65995063EC44}'. Error code: 1608.
My Work-around steps are:
1. Reverse the GUID and search registry for 5A6FB34A. Then I got the
following result:
[HKEY_CLASSES_ROOT\Installer\Features\5A6FB34A0F5DAAA4FB1456990536CE44]
"MSXMLSYS"=""
[HKEY_CLASSES_ROOT\Installer\Products\5A6FB34A0F5DAAA4FB1456990536CE44]
"AdvertiseFlags"=dword:00000184
"Assignment"=dword:00000001
"AuthorizedLUAApp"=dword:00000000
"Clients"=hex:3a,00,00,00,00,00
"InstanceType"=dword:00000000
"Language"=dword:00000409
"PackageCode"="DE7407CFE6F395A47B7DFAD7A9682916"
"ProductName"="MSXML 6.0 Parser"
"Version"=dword:060a0469
[HKEY_CLASSES_ROOT\Installer\UpgradeCodes\7AB711B11CB5E91428E0D7F4F314C2B7]
"5A6FB34A0F5DAAA4FB1456990536CE44"=""
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Features\5A6FB34A0F5DAAA4FB1 456990536CE44]
"MSXMLSYS"=""
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\UpgradeCodes\7AB711B11CB5E91 428E0D7F4F314C2B7]
"5A6FB34A0F5DAAA4FB1456990536CE44"=""
2. Delete two keys which have "UpgradeCodes" in them and leave others
untouched.
[HKEY_CLASSES_ROOT\Installer\UpgradeCodes\7AB711B11CB5E91428E0D7F4F314C2B7]
"5A6FB34A0F5DAAA4FB1456990536CE44"=""
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\UpgradeCodes\7AB711B11CB5E91 428E0D7F4F314C2B7]
"5A6FB34A0F5DAAA4FB1456990536CE44"=""
3. Install SQL Server 2008 again, which is developer version for me, and it
went through without any hassle.