New to computers no one told me not to turn off on power button on tower and consequentlly the hard drive is u/s.
Windows 8 - which has been around since 2012, and more recent versions - have been designed to be switched off in various ways using the on/off button of the PC/laptop/tablet.
In the first version of Win8 there was utter confusion among many PC users who had upgraded where the shut down button could be found, since the "Start Menu" had gone. People just could not believe after years of being told to "shut down the computer properly" by Windows, that you could at last just power off the computer, and it was now smart enough to gracefully shut down, instead of coming to a car-crash that needed the drives to be checked, start in safe mode etc, the next time you powered up, added to the insult that Windows itself had crashed in the first place, usually, forcing you to turn it off.
Even in previous versions of Windows, shutting off the power regularly rarely did any disk damage, and if you were using the PC with another Operating system, such as Linux, just powering off never seemed to affect the hard disk life.
So why the Hard drive should have packed in due to that method of operation/shutdown is a mystery. Yes they do die, but usually after longer than 18 months. Perhaps it hasn't and there's a different fault?
As mentioned above, hard drives are to be had for amounts from £40, and fitting them in Tower PCs is rarely more than a few minutes task, but a new license for and installing Windows will bring the price up to over £100, and if time is taken to make sure all is behaving properly, I suppose £200 could almost be justified.
If there is one bit of DIY that will save you money and frustration is learning how to upgrade and maintain your computer.
A tower or desktop is the one device in your home that is totally user serviceable, from case and power supply, motherboard and disk drives to memory modules and accessories! All you need is a screwdriver.