Thanks yasu

It is solved now!

I have almost spend 3 days for this issue.

I tried more than 10 times just for intallation....

Hi

I checked my registry.

Since the installation hadn'T complete due to this error,

no entry can be found in the registry.

I guess the problem may relate to Active Directry.

Hi

I had also same problem.

http://social.msdn.microsoft.com/Forums/en-US/sqlsetupandupgrade/thread/6ccf9380-852d-4b59-b128-97e0e870452c

So far still I couldn't find the solution.

I'll try to check the registry if I could solve this issue.