Really frustrating update failures. Slowed down my PC by 1000 times

Hello, I've been using windows 8 from its beta days. But after upgrading to windows 8.1, every major update seems to fail. I've also looked into the history and tried installing them manually but it fails after the stage "copying packages to the windows
update package". And if this isn't bad enough, my laptop takes about 20-25 minutes to shut down. It keeps showing "preparing updates, please don't turn off your computer".
I am getting really frustrated since there is nothing I can do about this. And this doesn't seem to be the first time, it happens every time there is a major update.
Also after this update failures, i seem to have other issues such as
Wifi stops working after 5 minutes of youtube streaming
chrome crashes more often than ever
performance in general has been absolutely awful
None of these happened before. Also I do not have any viruses or malwares.
Currently failed updates.
KB2887595
KB2919355
Should i just downgrade back to windows 7? Or is there a permanent solution to this problem.
Also when I install the update manually, the error says "The system cannot find the path specified"

Hi,
Are there any error code? please also check Windows\logs\cbs for the detailed information.
for KB 2919255, this is a known update , we call it Windows 8.1 update 1, you can refer to this link ans see if it can help you
http://windows.microsoft.com/en-in/windows-8/install-latest-update-windows-8-1
You can also clear the software distribution folder, then install the updates again.
At the Command Prompt type the following commands one at a time:
net stop wuauserv   hit enter
net stop bits     hit enter
Now browse to the C:\Windows\Software Distribution folder and delete all the files and folders inside.
net start wuauserv     hit enter
net start bits    hit enter
Meanwhile, keep your windows uo to date before installing the two updates. KB 2919442 is the prerequisite to install KB 2919355
Yolanda Zhu
TechNet Community Support

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Really frustrating update failures. Slowed down my PC by 1000 times

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