SharePoint 2013 - Check Correlation ID using Management Shell

<GUID> = Correlation ID = 0e90cb9c-1855-80fc-177a-ebaed1a55500

Code:
get-splogevent | ?{$_.Correlation -eq "<GUID>"} | select Area, Category, Level, EventID, Message | Format-List
Example:
get-splogevent | ?{$_.Correlation -eq "0e90cb9c-1855-80fc-177a-ebaed1a55500"} | select Area, Category, Level, EventID, Message | Format-List

Minimal Download Strategy in SharePoint 2013 ( _layouts/15/start.aspx issue)

_layouts/15/start.aspx is part of the Minimal Download Strategy in SharePoint 2013 which helps in improving the performance of page rendering. If you are having issues with it you can deactivate this feature at the site level using the below step.

Site Settings >>  Site Actions >>   Manage Site Features >>  Deactivate Minimal Download Strategy Feature.