After reading all these posts I came to the conclusion that staying with ACA2010 was the right decision. Now I don't lose my precious time configuring my workspace at each new release.
Upgrades should occur in a 3 year cycle and include new tools (not a new interface at each new version).
For more information on this known Autodesk Support Knowledge Base article, please follow this link:
Additional discussion about this issue can be found here:
FLEXnet License Admin | MSI Cleanup Utility | .NET Framework Cleanup Tool | IPv6 NLM Fix | adskflex.opt Options File | Combine .LIC Files | Disk Space
Well I got it to work, so thanks everyone. I had to restart internet explorer. I also had to delete the L folder before the zero folder in the registry that was mentioned earlier. The fix works, just remember to do the small housekeeping stuff afterward.
extra kudos to "karan9delhi"
You may follow the steps provided through this link:http://forums.autodesk.com/t5/Installation-Licensi
"The first solution is to go into Internet explorer>Tools>internet options or control panel > internet options.
Under the security tab, choose internet zone. Click custom level, and enable the options pertaining to ActiveX ontrols ans java scripting".
Let us know if this worked for you. You may also send us the serial number through privatem message (envelope next to your account name at the top of this page) so we may have a look further.
Thank you for your cooperation.
HI. I have downloaded my student version. During the installation i have entered the serial yet during first run autocad prompts me to activate. But on clicking activate, only a black screen comes.