Black and white Computer

Recently I have installed the windows 8.1 dual boot with Ubuntu. However , the Ubuntu has can't be start up. However when I open My computer, it will still have the start up option . The first thought was uninstall the Ubuntu (Ps: I use wubi installer to install Ubuntu) . After Uninstall the Ubuntu, I restart the computer and found that the startup option of Ubuntu still at there. Ok , let skip the story part to the solution: Run CMD.exe as Administrator (UAC) bcdedit bcdedit/delete {identifier} Example : bcdedit/delete {347989da-7c6c-11e3-bece-001e3123bbd6} In my case is using chinese word ... so in english word should be is identifier. Thank for reading my blogs.Leave comment if you have any others suggestion to remove boot option

Concurrency (computer) is a concept where many process or thread run simultaneously in uniprocessor or multiprocessor or multicore. Computer users take it for granted that their systems can do more than one thing at a time.Even a single application is often expected to do more than one thing at a time. Concurrency arises in 3 different contexts: Multiple Applications: Multiprogramming was invented to allow processing time to be dynamically shared among active applications.  Structured Applications: As Extension of the principle of modular design and structured programming.  Operating system(OS) structure: OS themselves implemented as a set of processes or threads.  Here is some of the key term use in concurrency. Atomic Operation Function or action implemented as a sequence of one or more instructions that appears to be indivisible; that is, no other process can see an intermediate state or interrupt the operations. The sequence of instruct...

Revolution OS is a 2001 documentary which traces the history of GNU, Linux, and the open source and free software movements. It features several interviews with prominent hackers and entrepreneurs (and hackers-cum-entrepreneurs), including Richard Stallman, Michael Tiemann, Linus Torvalds, Larry Augustin, Eric S. Raymond, Bruce Perens, Frank Hecker and Brian Behlendorf. The film begins in medias res with an IPO, and then sets the historical stage by showing the beginnings of software development back in the day when software was shared on paper tape for the price of the paper itself. It then segues to Bill Gates's Open Letter to Hobbyists in which he asks Computer Hobbyists to not share, but to buy software. (This letter was written by Gates when Microsoft was still based in Arizona and spelled "Micro-Soft".) Richard Stallman then explains how and why he left the MIT Lab for Artificial Intelligence in order to devote his life to the development of free software,...