Recently I seems to have a problem with ESS V4.0.314 hanging when I boot-up the computer. The splash screen (robotman) comes up but does not continue with the program install, it just hangs there and freezes up the computer. This has happened now several times to me, and is very frustrating. However I have been able to overcome this by re-booting and reverting the hard drive to an earlier time, after which it boots-up normally. Does anybody else have this problem, and what would cause this to happen? Thanks.