I had this issue with the x64 version of STS 3.2.0-RELEASE on Windows 7. The following worked for me which is also documented here:
- Check your
eclipse.ini
and make sure that the VM path points to the bin directory of your JDK or JRE and not to javaw.exe. For me the argument isD:/Development/Languages/Java/Development Kit/bin/
- Unpin Eclipse from the taskbar or delete the shortcut
- Run
eclipse.exe
from Windows Explorer and choose your workspace - Pin Eclipse to the taskbar after the splash screen has loaded and when the main window is shown