The disk is not formatted
The message "the disk is not formatted" usually indicates that the section of the disk is damaged, removed or destroyed. This can be caused by a virus, hardware overload, shock, update of the software on the disk, antivirus program - even just installing a new software can damage any of the sections of the disk.
The hard disk clicking
The reason for the crack in the hard disk can be failure of the heads or of the commutator, damage to the ROM-BIOS, electronic problems such as burnt chip, controller malfunction, failure in the service sectors, a destruction of the plates of the hard drive or of the drives around it due to a falling, physical impacts or electric shocks.
Blue screen when loading Windows
If a blue screen appears during booting or during the execution of any operation, it could mean damage to the operating system, the presence of bad ,unreadable sectors on the hard drive, malfunction of the hard disk, the presence of a virus or Trojan horse, destruction of the logical drive or of the file system.
The computer constantly restarts
The most common cause in which a computer continuously restarts is a penetration of virus in the boot sector, which forces the system to constantly return to the boot sector and perform a reboot.
Permanently freezing of the system
When the system "crashes" when trying to boot or in access to files or programs, this usually means there are bad sectors on the hard disk and the system can not access the information needed for opening files or for downloading programs. This may be due to corrupted files, conflicting commands using the shared program files, or exhaustion of system resources - as scarcity of random access memory (RAM).
The disk or the device are not found
When constantly is received a message that the device is not ready, the hard drive or other device are not found, this could mean that the hard disk is defective, the priority of loading in BIOS is changed, the structure of the sections is damaged or a virus has infected the system.
The operating system is not found
If you receive a message that the operating system can not be found, it may mean that there are damaged files in the operating system, the priority of booting is changed , the tables of the partitions are damaged or the hard disk is reformatted.
