1. For Lens Cleaner, somebody recommends for Manual Cleaning and somebody recommends for Software for the purpose. What is your opinion, Sir? 2. When I do by clicking Start-Find-Files or Folders, it appears a Dialogue Box (Find: All Files). In this place the options Column (as Named) there, the Files or Folders we searched for once are stored permanently. How to avoid such option, Sir? 3. Is there any possibility of storage of any Files (in Word or Excel or Internet Files or websites saved by us) on any place in my Computer automatically that to even without my knowledge? 4. I heard that any Files or others can be stored secretly in a place where the neighbors cannot find such Files. How it is possible, Sir? Your detailed reply may be helpful to me, Sir?