if you have

"The "ResolveComReference" task could not be instantiated from "Microsoft.Build.Tasks.v4.0, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a". 

this error , most probably you've modified devenv.exe.config and added there

    <NetFx40_LegacySecurityPolicy enabled="true"/>

, am I right?

If this is the case, do this:

1) remove     <NetFx40_LegacySecurityPolicy enabled="true"/>  from devenv.exe.config

2) re-open VS,  compile your project. It will generate you all interops with no problems.

3) close VS, add     <NetFx40_LegacySecurityPolicy enabled="true"/>  again if you need it.

4) open VS, open your project.   Your references will be fine now.