Investigating, you discover that your system drive is running at 100%. This issue affects both hard disk drives (HDDs) and solid state drives (SSDs). The latest versions of Windows have a problem with the drives being over worked, which slows down the operating system.Open up a terminal and find out which partition has your Ubuntu installation: Its the usual problem booting up a machine with more than one OS!If you sure that your hardware is completely healthy..(I mean your HDD cable is properly attached and meanwhile theres no bad sectors on your drive) though its rare,then you can go through these steps I suggest you read this answer first Next, I personally prefer using Poppy Linux to recover any system with corrupted bootloader..because theres a good featured Grub Installer that recognize both Windows and Linux Partitions or you can use any other tools like "grub boot disk" keep in mind, Windows environment is not a good choice to makeup your boot.
When I get that error I can still watch the video by hitting the pop-out button below the viewing screen. I can't stop that error occurring but I am still able to watch the video. This is not an issue with my Windows computers which I refuse to browse the internet with unless I really need to. This is the reality, 3 choices/reasons Update flash player Update browser Discover the truth about patented codecs: https://support.mozilla.com/en-US/kb/Youtube HTML5 does not work in Firefox If this happens to you in IE or Chrome it's probably the flash Clear history when Firefox closes-Settings, and check everything, every single box (clear everything). I have the same problem ever since I install a wireless network card and go wireless, all websites and video clips work fine and only youtube videos gives me problem, I switch back to the wired network adaptor and youtube video is ok again.This worked for me when Ubuntu 13.10 installation broke my Windows 7 loader. disk write error means bad install i think, also probably its time locked by steam to not run until release time.Several fixes are available for this, depending upon what exactly is causing the problem This performance issue is most obvious when attempting to use Search (Windows key Q) to find a file or program, and anything else that requires the drive to do some work (perhaps copying and pasting a group of files).To establish whether it is a problem that is affecting you, when your computer next slows down press CTRL ALT DEL and select Task Manager.(Alternatively, right-click the Taskbar and select Task Manager.) Note that this may take some time to open with the drive being slow.