Sorry if I post in a wrong section. My friend had Windows 8.1 in his HP computer. When he copy picture from usb to Picture folder, he can view it. However, after a reboot or when he turn his pc on, all his picture in the Picture folder disappeared. Seem like the pc, remove his picture after he turn computer on. There's no virus/malware etc since he just got the computer a day ago. He tested with his laptop. Copy picture from usb and paste to picture folder. After a reboot his picture are still their. Any suggestion? Thanks.