Startup problems are usually related to a type of hardware failure. And, they can also be an indication of a virus infection.
If the computer is new, then there will be no hardware faults and the startup problems will not be related to hardware failures.
Startup problems can also be caused by an antivirus or virus.
Problems such as the computer starting up slow or hanging can also be caused by a motherboard fault. It can be common for a desktop computer to hang on the startup and is usually caused by dried out capacitors on the mother board.
Other startup problems include a bad sector on the hard drive which causes system instability thus causing crashing of the computer.
Blue screens during the startup can also be caused by a faulty CPU. In our practice, we have had a couple cases where the system crashed during the boot process and it was just because the CPU was burned out. In these cases, the CPU was also stuck to the heatsink and it was difficult to remove it.
A computer virus is also a factor that can bring the system to an unstable state. With a virus, usually the system is slow and sometimes does not even start. But, with a virus infection, one never knows and it could be different every time. It all depends on how severe the virus is. When a virus is very severe, the OS reinstallation process is the easiest and best solution.
Sometimes, during the boot process, there is a message displayed, that the BOOTMGR is missing. This can be caused by a virus; and it is recommended to test the hard drive as well as hard drive problems are very common.
If on the startup, there appears a message that the Operating System is missing, this is an indication of a hard drive fault.
A hard drive fault can inform BIOS. But, when this occurs, it is usually too late and the hard drive will no longer be able to be used. BIOS shows in S.M.A.R.T. data, and if it finds something that it thinks is not good then it shows a message such as “S.M.A.R.T. reported imminent hard drive failure. Please back up all data as soon as possible”.
When S.M.A.R.T. data reports that the hard drive is failing, then this is usually the time to take all the data from the hard drive and replace it as soon as possible. In our practice, we have never seen S.M.A.R.T. data or another hardware monitoring device display a message that there is a bad sector on the hard drive. When S.M.A.R.T. data displays that something is wrong on the hard drive, then usually it is full of bad sectors.
Shockingly enough, Windows does not have anything to monitor the hard drive. It does, however, display an error message or something similar sometimes. You will almost never know about the hard disk state from the OS.
And, Windows does not inform you that during the startup, it cannot read from the hard drive. Instead, it usually displays that it is not able to find something or that something is missing.
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