Avast consume 100% CPU when get into a specific folder in my HDD

[igor]

That's the emulator... meaning something is being unpacked.

[Asyn]

However a process called Sf.bin appears occasionally randomally in the task manager and takes 50% from the 100% usage of the CPU that Avast uses at that moment.

Sf.bin is part of avast. (code emulation)

[dor123]

Also the process of Avast that takes 100% CPU when i enters D:\Backup is AvastSvc.exe.

[Asyn]

Sorry, but don't you understand what we're telling you here...??!
Change your settings.
Problem solved.