SAP Portal Post-Installation Errors

Common Errors most people witness when they try to install Portal....

Scene 1:
A brand new installation without applying the patches will throw a dirty error like the one below :

(Click on the image to see a full blown error)
When you right click on the folders in the PCD the below error is seen..













This error is for people who have just read the meaning of the word PORTAL ...in other words when you access the portal with the IP address which should not be the approach...Use FQDN instead ...Fully Qualified Domain Name i.e hostname.domain.com:portnumber

the PCD in system administration will not run for this error..