Can't Install Older Version of Framework

Hi Telerik Team,
 I am faced with similar situation here. Cleaned all the leftover from the newer version of telerik; used CCcleaner as suggested in one of your post. But still I am not able to install the particular version of Telerik Testing Framework I am looking for.  Could you please share if you did find any solution for Dan's Case.

Thanks in advance.

Regards,
Anil