is there any idea how to prevent multiple opening of window explorer to avoid hang up?there is security setting?please help.thanks 
My Computer
- Computer Manufacturer/Model Number
- acer aspire 5740
- OS
- window7 ultimate 32bit
- CPU
- intel core i3
- Memory
- 2GB
- Graphics Card(s)
- intel grahic media accelerator
- Monitor(s) Displays
- 15.6''HD LED LCD