Unwanted actions, converting audio/video files, bad programming error(s), malwares or working with compressed archives sometimes makes your CPU usage 100%.
Because these processes completely consume the cpu, your system becomes sluggish to respond and using the computer for other tasks becomes impossible while these processes are running.
This mean, your system will be down immediately. There is one way that you must press the RESTART button to reboot your system.
Important datas still not saving will be lost without any confirmation.
[FireLion] FrostShield keeps your PC smooth even the CPU usage is 100% loading.

• [FireLion] Get My Files Back 6.0.1
  [FireLion] Get My Files Back doesn't depend upon the recycle bin or weak undelete procedures. It goes straight to the disk drive to identify and recover the file fragments that...

• [FireLion] Get My Files Back 6.0.1
  If a file has been partially overwritten, it attempts to reconstruct as much of the file as possible with the remaining contents Get My Files Back will allow you to recover critically important documents, or other files, which have been lost by accidental deletion

• Intelligent Shutdown 1.5.4
  Intelligent Shutdown Software Shutdown with LAN-activity or CPU activity - Usage

• CrazyInfo 1.3
  Small tool for displaying the CPU clock, CPU usage, RAM usage! If you own an ASUS mainboard, use the CrazyInfo_ASUS

• [FireLion] Link Sniffer 3.2
  Just simple clicks to get real multimedia links with [FireLion] Link Sniffer

• [FireLion] Anti Keyloggers 2.0
  [FireLion] Anti Keyloggers is just as effective at blocking unknown keyloggers as it is at blocking those that have been around for years