PT3 opens only 1 time after download!

Hi
I have a strange problem with pt3. after i downloaded it from this website it opend up and worked good. when i restarted my computer the next day, pt3 didn't open anymore. when i checked my task manager it showed that pt3 is on. when i end the process i can't use my internetexplorer anymore... i have to restart my computer again. then i uninstalled pt3 and downloaded it again. and again it opend and worked. after i restarted my computer the problem with the not opening was there again. am i doing something wrong??
I have a strange problem with pt3. after i downloaded it from this website it opend up and worked good. when i restarted my computer the next day, pt3 didn't open anymore. when i checked my task manager it showed that pt3 is on. when i end the process i can't use my internetexplorer anymore... i have to restart my computer again. then i uninstalled pt3 and downloaded it again. and again it opend and worked. after i restarted my computer the problem with the not opening was there again. am i doing something wrong??