Today i solved a two year problem with Windows 7 and my hp notebook. After leaving the computer idle for a while 10 or 20 minutes or more, the computer become unresponsive and the hard disk keeps working forever. To restore to normal operation i had to reset the pc.
To solve the problem i followed these steps:
1. Disable Windows Search from Control Panel >> Programs and Features >> Turn Windows features on and off and uncheck Windows Search
2. Remove all Windows Tasks, deleting all files and folders in these folders:
C:\Windows\system32\Tasks [for 32 and 64 bit systems]
C:\Windows\SysWOW64\Tasks [for 64 bit only]
3. Disable Windows Task Scheduler from registry: locate HKLM\SYSTEM\CurrentControlSet\Services\Schedule and change the Start value from 2 to 4
4. Disable Disk Defragmenter service from services.msc, set as DISABLED