I am using windows x p o s my problem is that the newly software installed file and video any type of file are deleted from the computer automatically when the computer switch off but the system old file are not deleted. I scan whole system using symmentic endpoint protection and use advanced system care and use PC tool and anti spy ware but the problem is still in my computer please give me some suggestion such that I can find out the solution and cure the system . I search lot on internet I do not find the proper answer. My email id is--->Removed<

Have you tried a system restore to BEFORE this started happening ?

Reinstall, as the last option :/

No

No after formating harddisk the problem is still showing notification like lost your saving data due to hardware failure or network connection the saving data are lost after switch off the computer

Those error message normally indicate a failing hard drive.
Time to find a replacement.