I have created a system DSN for connecting to sql but when I ran the setup of

vcenter4.1 it throws an error no 64 bit DSN found.

Therefore to work around this issue just create a sytem DSN & after that

open regedt32 on server go to HKLM>Software>ODBC>DSN that you have created & replace its driver

with C:\WINDOWS\system32\sqlncli10.dll.

After this setting try again & manually enter the DSN name in setup when it is asked.

🙂 🙂 🙂 🙂