Mildly annoying problem with a simple solution.
If you use the Eclipse IDE on Windows 7, you may notice that it does not behave nicely on the taskbar. If you pin it to the taskbar, once your workspace is open, Eclipse will add a second icon to the taskbar (and right-clicking it does not yield any option to pin it). From what I’ve read, you may have to be using the 64-bit version of Eclipse to experience this issue.
To fix it, you need to add the path to your 64-bit JDK’s bin directory to your system PATH variable. And, it needs to come before C:\Windows\system32 on your PATH.
The reason for this is Eclipse will execute under C:\Windows\system32\javaw.exe if that is the first potential JVM that it finds. Eclipse only demonstrates this troublesome taskbar behavior when it is running under javaw.exe. If you add a JDK path to the PATH variable that it will find first, it will use that JDK’s jvm.dll as the JVM and everything will be fine.
If you need help figuring out how to set your system PATH variable or where your JDK is installed, consult Google. If you’re using Eclipse, then you must be a programmer, so I am assuming that you know about such things.