TiWorker 50% of CPU and Updating doesn't work in any way

I just purchased a copy of Win 8 Pro and I see that there is a process eating up 50% of my CPU.

It's called 'Windows module installer worker'/TiWorker.exe.

I've tried to run some updates in the hope that it will fix it (although why aren't the updates included in the Win 8 version I just downloaded today, I don't know). I cannot update anything.

I am very frustrated as I've wasted 6+ hours of my weekend on this and while I was enthusiastic on switching to Win 8, it turns out it's such a complete waste of time. Incredible and if it wouldn't be midnight, I would be half way through installing Win 7 right now.

I fixed mine, not the best solution but hey it works

go/to  Control Panel\System and Security\Windows Update\Change settings

then select never check for updates. all done ;)

just remember to check for updates manually once in a while

I'm having the same problem with a brand new Dell all-in-one.  TiWorker.exe is reading at about 800kb/sec and writing at about 200kb/sec, and has done so for 10 minutes, leaving my machine almost unusably slow.  Performance Monitor shows nearly all file accesses are under \windows\winsxs.

I cant believe I had the same type of problem with that "tiworker.exe" program or file or whatever. I just bought a Toshiba satellite C855D-S5320 and instead of getting better performance I got a load of trouble shooting duties for my Saturday. I don't know if its a Toshiba problem or a Windows problem but gees, come on seriously? The fact that I have to be doing investigations, trouble shooting, tracking down rouge programs is infuriating and so disappointing. Then I read the "tech" solution to the problem and its more of the same scanning and probing and downloading another "diagnostic" program on top of Toshiba's and Microsoft and Norton's! It's a NEW COMPUTER!!!! Why is this causing such a problem for the system to handle. I noticed that it was taking up all the resources and massively slowing down the CPU until I finally just rebooted the whole thing. Its recorded in the logs as a potential compatibility problem.

Yeah, It's not a Toshiba problem, it's a Windows 8 problem. I'm having this problem on my HP Pavillion G7, It's really annoying that the recommended service, "Microsoft Security Essentials" is only for Windows 7. It's also annoying that tiworker.exe is a Windows task not a virus, and they recommend a virus scanner.

The link to the troubleshooter helped, but only a little.  It confirmed that it could not fix the failure to update Windows.  Manual install does not work either.