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In my windows 7 machine, I installed Daemon tools lite so that I can mount cd/dvd iso images. But when I add a new virtual drive in Daemon Tools, the native popup of installation of driver failer pops up in taskbar. I tried running as administrator, but no luck. Then I installed another freeware called WinCDEmu, but the same 'failed' popup comes when I try to add a virtual drive.
Is there anything fault in my registry which interrupts this driver installation?
I have install avast antivir, but I even disabled it to see whether is causes this. But results were the same.
Can anybody give me an explaination.
Snapshots:

Thank you.
This shows how to clean up the SPTD registry keys and install SPTD by itself (without Daemon Tools): http://geekswithblogs.net/apopovsky/archive/2009/08/14/re-installing-daemon-tools-lite-and-sptd-on-windows-7.aspx
– sparkey – 2014-02-09T06:20:05.253I didn't install SPTD in Daemon tools installtion. I only needed to Mount CD/DVD drive. – Deepal – 2014-02-09T07:22:19.610