Could not load file or assembly ‘[assembly name]' or one of its dependencies. Access is denied.

This error was showing up when trying to build a solution.
When googling you can find several solutions. In my case, the reason was an Antivirus software. I just disabled the access protection to the folder
‘C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files'.

All worked.