This is an indication of "out of sync" windows - java - eclipse version.
Solution- : Make sure all (OS, JRE\JDK , Eclipse) are 32 bit or 64 bit.
How to check:-
1) Windows Version:- My Computer -> Properties -> System Type
2) Java Version:- Open command prompt -> "java -version"
3) Eclipse:- Go to the Eclipse folder -> Search For Eclipse.ini file.
Look for something like:- ctrl-F
"equinox.launcher.win32.win32.x86"
If present, it indicates that the eclipse is a 32-bit version.
Hope this helps.
Ashish Mishra