After I re-installed SSRS 2014 (with default config) I get HTTP 404 when I try to access the ReportServer or Reports pages I have SQL Server 2014 Express with Advanced tools installed. I had a previous installation, but I uninstalled the SQL instance and Reporting Services and then re-installed them. 

Right now, I'm unable to access http://localhost/Reports or http://localhost/ReportServer and I get a


  HTTP 404 Page not found error. 


Initially, probably stupidly, I thought it was because IIS isn't installed, so I installed that, but that didn't do anything. 

I also tried changing the virtual directory names then applying, but that also didn't work. What am I missing?
Well I'm not exactly sure what went wrong, but I reinstalled the whole SQL Server and then it worked again (as apposed to reinstalling only a few components last time.