In that case, I'd not just rely on chkdsk, but go to the manufacturer's website for the HDD and see if they have some downloadable diagnostic program. Wouldn't surprise me if the drive is on its way out, but obviously before going there it's best to eliminate other scenarios such as software.
Anyway, believe it or not, I can understand being the one who ends up taking the blame for not doing anything wrong. At a previous job I was rather ruthlessly taken advantage of because I was the only one who could figure out the bureaucratic mess that is being an Apple Authorized Service Provider. I was dealing directly with mid-level managers at Apple and on paper I'm just a service tech at this place I'm working. I catch one of said Apple managers pulling some suspicious stunts, I report it to the guy's boss and her boss. I actually took the issue all the way to the C-suite at Apple, purely with the intention of saying, "Hey, this seems a little fishy, maybe you should take a look." Part of the whole ethical code Apple expects certified techs to follow. They didn't even so much as say that they'd look into it, the sort of universal bureaucrateese for "shut up and go away" they come back around and accuse me of trying to blackmail the company because I told them I would not distribute some of the documents this guy sent me which he really had absolutely no business sending to me. They then also pressured my former employer to fire me, which they did... First suspending me for a couple of days without pay, and I would later come to find that they had already started the paperwork to fire me before they even suspended me. Basically cheating me out of about a week's worth of pay.
At the job before that, about a month or so before we parted company on rather bad terms, I found out that my boss had been basically embezzling money. He wasn't paying state or federal withholding taxes for employees. The company accountant found out about it and then tried to cover it up. Being that I'd never been in such a situation before, I stupidly agreed to let them give me a 1099 tax form with the promise that they'd pay me the difference and I could just pocket that. They paid me the back wages they owed, but then refused to pay me the back taxes they owed, to the tune of a couple grand. I was insistent enough that they threatened to sue me, right up until I told them that as soon as their legal representation finds out that they've been knowingly covering up tax fraud, they'd likely just refund any retainer left with a note saying to lose the firm's number. I reported the issue to the IRS, which strangely, has no means of following up on a complaint. Not even to find out if it's under active investigation. It just kind of goes into this black hole somewhere in the California Central Valley. The owner of the company died, but I can always hope that the accountant has, at the very least, been stripped of her CPA and barred from practicing for life.
I also have a friend, who I've mentioned a time or two on here. Worked for ASUS Computer International in California. He was one of about 10-20 non-Asian individuals in the company, which is around 300 people total. Not just Asian or even Asia-PAC either, pretty much everyone was either Chinese or Taiwanese. Now considering ASUS Computer International is basically the official and exclusive reseller of ASUSTek products in the United States, and ASUSTek is a Taiwanese company with a lot of ties to China... To quote the French: Quelle surprise! Anyway, for several months his coworkers basically treated him like dirt and two different supervisors going out of their way to deny him access to the kind of training needed to do his job. As he put it, the good days were when they completely ignored him and pretended as if he didn't exist. He tries reaching out a couple of times, each time they swear up and down it's just some kind of misunderstanding, but nothing changes. Finally he says something about how it seems odd that he's the only white person in the group and he's the one that seems to be systematically excluded. The person he said it to, Asian, flips out and by the end of that work week they are filing a complaint with the HR department. The same person was also, coincidentally, caught red-handed manipulating his performance reports on four consecutive occasions, but naturally the HR department at an Asian company isn't interested in any of that. Long story short, as soon as my friend says something that could be construed as being about how he's treated differently because of his race, he's subjected to an ambush interview by the HR department who doesn't even tell him the nature of the complaint, then fires him about 2 days later. They even went as far as to encourage the complaining employee to file a false police report. I personally suspect some of it had to do with the fact that the HR investigator was a lesbian (based on everything I've been told, it seems a safe assumption) and the complaining employee was a reasonably attractive young Asian woman. So even in the San Francisco Bay Area, probably the single biggest bastion of liberalism and tolerance to everyone's differences, these things still go on. Needless to say, I don't hesitate to badmouth ASUS any chance I get, when I can contribute something more than just how ASUS is a racist company. (My personal opinion obviously) Fortunately that friend has landed another job now where his coworkers are extremely friendly and supportive and his boss is the same way. Everyone deserves a job where you're at least treated with basic human dignity.
So, long story short, I get where you're coming from. Maybe not quite to the same extent, but I definitely understand what it's like to be falsely accused of things. I'm not usually one given to strong emotion, but that is the kind of thing that just infuriates me. Many years later, I could still throttle the school principal from my old high school for the way he would regularly single out lower income kids who might be a nuisance and just railroad them into expulsion or make life so miserable for them they'd drop out. To think of how someone in that position was actively cheating people out of a basic education... I'm hoping I can help get your problem resolved. May not be much, but it's what I can offer to someone who knows where you're coming from.
Anyway... On top of the HDD diagnostic program (and don't just run some generic thing that only checks SMART status) be sure to post the hijack this log Bob suggested. I don't personally have the patience to wade through those, but I've seen on more than one occasion where he's picked something out of that list which solved someone's issue. If someone's willing to dig through that, by all means, take them up on that offer before they come to their senses.