Failed Backup (grrrrrr)

Hi - I'll try be as concise as I can be with my problem. Something bad has got hold of my computer that doesn't allow me to play any video media whether on my desktop or online. This situation cropped up when I was notified of a bunch of critical updates were available. I tried updating and inevitably the updates would fail. Now it might be quite the coincidence that both of these things cropped up at the same time. Whatever has hold of my computer also does not allow me to get into my Control Panel to see my System (it will crash and back out of the Control Panel automatically - the same as the videos that I try to play). So I've decided to backup my important data to a new internal hard drive that has been formatted and the desktop does recognize the drive. Here's the problem - after waiting for 2 days of a backup from C to E happening, I get home today to see a message that the backup failed with an error code 0x80070003. I Googled the code and it brought me to an article with a Fix-It tool which I downloaded and ran. I can see that there is something on my E drive but I can't 'see' what files are there. Are they all there? Was the backup unsuccessful half way through? Three quarters of the way through? How am I to know? What if I proceed with the restore to factory default settings and I don't have all my data backed up? I should mention that when I left the computer running the backup this morning, it was at 42%.
When I look at the properties of my E drive, it is telling me that there is 833GB free space of the 2TB.
Please, what should I do next?

Is there no one out there with any help?

"Something bad has got hold of my computer that doesn't allow me to play any video media whether on my desktop or online"

before you try to run a backup--you need to resolve this issue of 'something bad'
(if you have a virus or malware, backing it up is a bit foolish).
once that's resolved you should be able to proceed with your backup--a number of questions do arise:

what software are you using for backup? (it shouldn't take two days to backup)

did the 'problem about not being able to play videos' crop up before or after you tried to install critical updates?

what antivirus are you running? anti malware?

Hey NimoTony - thanks for the reply. I've been trying to backup my files and folders. I've been on Bleeping Computer and the Computer Hope forum (on separate occasions) with the 'bug' issue and they couldn't find anything after running a gazillion anti-malware/debugging programs. It was on their suggestion that I back up what I want as far as files and folders and then default to the factory settings. I tried to backup with Acronis True Image 2014 but it wouldn't recognize my new and formatted 'E' drive hence the failed attempt with Windows Backup and Restore, which did recognize the backup destination.

The 'bug' issue started after doing Critical Updates.

I'm using Norton Internet Security 2014 and use a combination of Super AntiSpyware Pro, Malware Bytes and Hitman Pro to do sweeps of my HP desktop (not at the same time and not in conflict with Norton).
I too was unpleasantly surprised that it took two days to backup with the error as a result. Very frustrating. I'd like to get this infernal machine back to a smooth running state. Any help would be appreciated.

P.S. - I was/am still getting notifications of the same Critical Updates even though they've apparently been successfully installed (at least looking at the update history).

Yup - already did that. Seagate drive and I've already downloaded and tried the repairs. Now I'm in a quandry because I used the Paragon Hard Disc Manager to backup to my 'E' drive successfully. It looks like I might have to take a gamble and reset my 'C' drive to the factory settings, transfer my data from my 'E' drive to make the whole thing complete again and then take an image of my 'C' drive to hopefully transfer the image back to my 'E' drive which is new. My head is spinning just thinking of it.

It was a few weeks ago that I did it as part of this bug issue and it came back with a clean bill of health (the hard drive did - I know it's not for anti virus).