A quick search on the error you have received shows that this problem might be caused by insufficient privileges to work with the databases in SQL Server. You can download the Microsoft SQL Server Management Studio (if you don't have it) and try to connect to the local instance of the SQL Server and check whether you have the requested permissions for the master database.
Please verify:
That the SQL Server is running
Your windows account have correct privileges to login to the SQL Server
Check the SQL Server role of the account - should be with distinct rights to create/modify databases
That your account is db_owner of the AdwentureWorks database
If you have verified the above and the problem persists, please use the following line in cmd prompt to install the product in order to provide more details in the log file and attach it here:
This issue is still present. It happens in any case, if you have Adventure Works or not.
I found a workaround:
- get the Adventure Works installer from Microsoft site and install this
- run the Telerik msi, but do NOT select Examples (basically install it without the Examples)
- after Telerik has been successfully installed, run the MSI again and this time choose Change and select the Examples
It should be able to complete the Example installation in this way. At least it worked for me.
I have another thread on this topic and after over a year of scratching my head on this I just posted a more complete solution there. I hope it helps someone.