Revit used to load up and run, now it only shows start up screen. no errors,

[Anonymous]

Can't get trial version to run properly.

Any ideas, will reloading it cause the trial to run out?

It ran for two days, now it looks up on startup, no errors, no nothing, just a circle of eternal waiting in the only clue something is happening.  Running on newer high end dell laptop precision 5030, 8gb ram