I have the same exact problem (4.9.28). And it all just started overnight. Checked for viruses and spyware (nada), I have well over the amount of resources needed to run it, and my java is up to date (v.5 update 4). Its very weird, because sometimes I can open it and it will run for say 10 min, and another time only 2 sec., and other times it willstay open until I hit the search button.