Hi Ankit,
Have you cleared or done something with the Shared Dll's as well ??
I'm asking this because I have try by deleting DIAPI from registry where ever I found and I dint found that at so many places but only at 3 places. I haven't done anything with shared dll's.
Once I delete from registry did a clean installation but still 1316 error was there . I have no idea why but yeah I'm getting this and I'm trying and following whatever I'm finding on scn but without any luck.
Regards