Steam Download issues

[CxMarriott]

I've recently started having the issue of games on Steam, during the download, being forced into the Update Required (Not Queued) list where they rarely come out and start downloading, if they do it last about 10 seconds or less where it then returns to the list. This has become a huge problem due to not being to download ANY game so Steam is pretty much useless. I've also noticed that some installers I download usually are corrupt and do not work the first time I install it so I have to install it for the second time for it to actually work.

If I try to click 'Play' to download the game in the Download list then it stops after a few seconds then shows the error 'An error occurred while updating Team Fortress 2 () (Image will be below) then it returns to the previous state and waits a bit to attempt to download again.

It is only recently this has started happening as before about the start of this month games would download fine. I have tried pretty much every solution. multiple uninstall and reinstalls (I have tried to Revo Uninstaller but I get error 'Running the applications uninstaller failed! Possible invalid uninstall command!' which means it did not uninstall at all.

Something that did make me wonder was that this started happening after I changed the case for my custom PC but I do not see how that could affect the download of a game.

I have uninstalled all kinds of programmes that could potentially interfere with Steam but nothing has solved the issue. I contacted Steam support and ran an 'MSINFO32' report for them but they came back saying that the issue was that the 'Disk was too busy' which I am certain it is not as I ran the download after turning off everything at start up besides steam so it was just that alone attempting to do anything on the computer and it just did the same thing.

Another issue which I have had ever since I first got the computer was that the images for the Steam programme are messed up, I am still not sure why this happens.

Any assistance in this matter would be greatly appreciated as I have no idea what else to do now.

Images:
http://i.gyazo.com/1cab3b6b7a5ea0abff060131ad5b6495.png
http://i.gyazo.com/d638c1d360c41924770ecfdd069fe29a.png

[schlong gobbler]

ok just found this post and have been having the same issue. along with 7 other friends from school. And it sucks so many balls. I JUST got a new 1500 dollar computer and got steam, for 1 night it was all fine and dandy, but then nothing would download, and the error popped up.

[Hobbes]

I've tried every fix in the comments. None seem to work.

[Hobbes]

I do know only one that works, continue to hit "add to queue" for a few weeks until it's done.

[AbsoluteKermit]

After completely deleting all of my Steam items and re-installing, the UK London download server appears to be working fairly well. Give it a try.

[AleNes]

I have the same issue with two games. Stuck at specificpoint every time.

Error:

[2014-09-03 18:33:37] Update job for app 251060 canceled: Failed updating depot 251061 while unpacking bad chunk "c813a8f539f0f5cce68fd6b6acad6552050d661a" from "content3.steampowered.com" (Unpack failed (c:412064,u:0,b:0)) (Corrupt download)

What I've already done:
1) Changing download location
2) Flushing Steam config
3) Completely reinstalling Steam
4) Completely redownloading
5) Bypassing router
6) Installing on another HDD
7) Installing on another computer