Been using STS 2.9.2 (64 bit) w/o any problems for several months on WIN 7.
Yesterday (8/16) STS 2.9.2 would not start up - the green splash screen just hangs. WIN Task Manager shows program "Not Responding;" trying to run javaw.exe in C:Windows/System32. Did some on-line research and changed my STS.ini file's "osgi.requiredJavaVersion" from 1.5 to 1.6.
STS started up. Good!
Went home and came back in this AM. Tried to start STS 2.9.2 - hangs on splash screen again.
After killing the hung process this STS window pops up: