There's a lot of changes made in windows 7. Auto sleep mode isn't a new one which system gets in sleep mode automatically after 10 min. I myself became a victim of this problem when i was trying to download a software about 2 GB. My Internet connection is not fast so i went to sleep after switching off the monitor. After my nap of about 2 or 3 hours , i found that downloading paused after just 10 min of my leaving! The system went to sleep mode !! :( So i searched Google about this problem and here am shearing with you what i found! Hope it will help you out.
- Step 1: Go to Control Panel> All Control Panel Items> power Options. By default 'Balanced' option is on. Just on the right side click 'Change plan settings'




