DTSOFT Virtual CdRom Device Failed

Hi,
I've seen a similar post somewhere, however, nothing works for me so far.
I have installed Daemon Tools Lite 4.47.1.0335 but when I try to add new virtual device this message shows: DTSOFT Virtual CdRom Device Failed

(if I open daemon tools, right click on .iso file the mount option is gray and cannot be clicked)
I have tried to update the device software (setting manually the driver software location to C:\Windows\inf) but then I get this message:
(the virtual device is under "other devices" on the left as my laptop doesn't have disk drive)


I have tried the Microsoft fix-it but it doesn't detect any problems, I have also tried deleting the upper and lower case registers and then installing it again but the registers simply does not exist so there was nothing for me to delete
I also found this as solution : Rename "C:\Windows\System32\DriverStore\INFCACHE.1" file and reboot your system; but I cannot do it since I need administrator permission and it does not allow me to delete it even thought I am the administrator and the only user on the laptop
I have also went through everything on here but still nothing: No virtual drive in My Computer | DAEMON Pro Help

Do you have any other suggestions :confused: I would really appreciate any help!
(ps I am using windows 7, 64 bit)

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