Integration services cannot upgrade HAL

Yesterday I did server replacement project. To simplify the process, I migrated the physical server windows 2003 sbs to virtual machine. Be careful on RAM installation as it has 12 slots, I guess only 6 slots are available if one processor installed, it takes me 2 hours to figure out. 

After conversion, the integration services couldn't be installed on virtual server. Finally I found a easy and interesting way to solve it:

http://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/7ea051c7-ac94-4f34-b6f6-8d75f4225173

Finishing touch is:

You need to use msconfig.exe and go to boot.ini. In my case, there were two boot entries of my server2003 installation. The one with disk2vhd at the start was on top. Change it to the normal server2003 boot path and reboot the machine.

payne80 you are awesome ~~