Eclipse gives “Java was started but returned exit code 13” [duplicate]

if you have updated your jdk to 7 you are most likely to face this problem.

This happens mainly due to:

1. incompatible sdk and jdk versions
2. using a 32 bit java version for your 64 bit eclipse JVM (programfilex86-java)

WHAT YOU HAVE TO DO :
firstly check the eclipse.ini file to see if you have a path that is pointing to your jdk
it should look something like this

-vm    
C:\Program Files\Java\blah\blah\blah\javaw.exe    

if not then locate the jdk 7 javaw.exe file
sample :

C:\Program Files\Java\jdk1.7.0_45\jre\bin\javaw.exe 

paste -vm and the path below it into your eclipse.ini file

-vm  
C:\Program Files\Java\jdk1.7.0_45\jre\bin\javaw.exe        

make sure that you type the above just before the -vmargs and after the OpenFile