Visual studio 2015, can´t add new projects

Did you try changing the .Net version?  (Top left dropdown)
Also ensure you're running VS as an administrator.

Hi,

Both things.

Was this an existing solution that you're working in or a brand new one from 2015?  If you just start a blank solution, do you get the same thing?  Trying to narrow down what's actually going on.

In a new solution show the screen attached.
If try open a solution, an error appears in solution explorer:

An exception was encountered while constructing the content of this frame.  This information is also logged in "C:\Users\rui\AppData\Roaming\Microsoft\VisualStudio\14.0\ActivityLog.xml".

Exception details:
System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.VisualStudio.ExtensionManager.CachedInstalledExtensionList.SynchronizeAutoUpdateInformationWithUserStore(ExtensionSettingsStoreList autoUpdateList, IReadOnlyDictionary`2 entryDictionary, IList`1 deletedExtensions, IList`1[] installedExtensions)
   at Microsoft.VisualStudio.ExtensionManager.CachedInstalledExtensionList.StopScan(Int64 timestamp, ExtensionSettingsStoreList autoUpdateList)
   at Microsoft.VisualStudio.ExtensionManager.ExtensionManagerService.InitializeList(CachedInstalledExtensionList cachedExtensionsList, IEnumerable`1 enabledExtensions, Boolean safeMode, Boolean isSdkList)
   at Microsoft.VisualStudio.ExtensionManager.ExtensionManagerService.InstalledExtensionListData.<>c__DisplayClass19_0.<CreateExtensionListData>b__2()
   at System.Lazy`1.CreateValue()
--- End of stack trace from previous location where exception was thrown ---

Thanks kyle. In fact is an incompatible extension.