"David
2D viewer works fine on all platforms of Win8.
Check the bit of your operating system and install the appropiate java.
In what way is that constructive feedback? You are essentially calling the rest of the people on this thread either liars or fools.
Believe me I tried installing the latest 64 bit version of java and that DID NOT WORK. Nor did the latest 32 bit version. Nor did Java 6.