If you wanted a simple trial, then just get it the simple way...

Turn off your download manager (just to be safe). Download the trial again.

It should install flawlessly.

If you gaze long into an abyss, the abyss will gaze back into you. 3.0 GHz Pentium 4 w/HT 1 Gig 400mhz DDR SDRAM 128mb NVidia GeForce FX 5200