The .Net Framework installed on this machine does not meet the minimum required version: 4.5.50709.

Installing visual studio 2012 ultimate edition on windows 8 release preview
The .Net Framework installed on this machine does not meet the minimum required version: 4.5.50709.

Solution A)

• Download the .NET 4.5 installer and extract it (run it with /x, or open in WinRAR, etc.)
• Go to the extracted folder and open ParameterInfo.xml. Remove the TAG blockers, completely: remove the branch < blockers >.
• Execute SEtup.exe and try to install it again.

(It worked for me in Windows 8 Ultimate Version).
Solution B)

• Run regedit.exe.
• Edit Framework version key.
  • WIN64-bit: Go to the following key:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v4\Full
  • WIN32-bit:Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full

NOTE: You’ll need to change the permissions before you can edit anything. First, change the owner to Administrators, then assign the Administrators principal with Full Control. – Finally, simply change the value for “Version" to “4.5.50709″. To change permission for editing registry, in Regedit, select you key, right-click–>Permissions–>Advanced–>Owner, select Administrators, Apply. Then grand Full Control to “Administrators"