If Peggy's solution does not work, I have someone else also working to fidn out whats wrong @ http://community.secondlife.com/t5/Technical/Second-Life-stops-responding-when-splash-page-loads/qaq-p/839235
After 'Loading VFS' displays, and the splash page window opens, the login info never appears, an a crash report and 'Windows is trying to find a solution' appear. I have re-downloaded SL three times and restarted my PC....none work