When using the DBCA tool under Oracle 11gR2 64-bit on Windows 2008, and trying to specify ASM as the file storage, the following error is encountered:
“grid infrastructure or clusterware home not found”
The DBCA tool must be run as Administrator, even if the account you are using is already an Administrator privileged account.
If you launch DBCA from the command line, the CMD executable must be launched with the Run As Administrator option.
the gruffdba 
Hi,
“grid infrastructure or clusterware home not found” when using DBCA on Oracle 11gR2 64-bit on Windows 2008
Please comments:
I ran as a sysadmin still has same issue on vm-win2008R2
Did the Grid Infratsructure install ok? Try launching ASMCA and make sure ASM is running, can see the disks and the disk group is mounted.