Computer problems 1 core 100cent with no reason shown in task manager Tags: New Build Core Computer Intel i5 Task Manager Systems Last response: March 11, 2012 10:44 PM in Systems Share alohascott March 1, 2012 7:17:30 PM Aloha i just recently put together a gigabyte z68ma d2 b3 motherboard with and i5-2400 cpu earlier today i replaced the cpu with a i5-2390t and it was running fine. but now i have one core running at 100 percent and i have no idea what is causing it. the total cpu usage is 32 percent the computer is behaving badly and its very sluggish. It runs much smoother when running prime 95 on all cores then it is now. any ideas? More about : computer problems core 100cent reason shown task manager alohascott March 1, 2012 7:22:24 PM system idle is at 98 percent in task manager, with one core still at 100 percent. i am shutting down and doing an antivirus boot with kasperky (SP) alohascott March 11, 2012 10:44:01 PM It was a bad hard drive. please close this thread Can't find your answer ? Ask ! Publish Related resources : ForumTask manager AND system tray ForumI have a dual core cpu but can't see it in task manager ! Forum100 % cpu whenever task manager isn't up? ForumCPU usage graph in Task Manager (XP) - What does % mean? ForumNo "set affinity" in Task Manager ForumTask manager see only 8 of my 16 cores ForumWindows Vista a reason to buy ECC memory? ForumWindows XP Task Manager not showing Apps running ForumAMD FX-8350 Eight Core benchmarks very low? ForumProblem with Task Manager ForumComputer device manager prefect but windows 7 says no dvd ForumBIOS says unlocked, Task manager disagrees ForumHELP! Task manager and explorer malfunctioning! ForumReasons for high core temperatures ForumTask Manager Disabled ForumPCI compatibility question ForumWill this work for my new computer build? ForumIntel Celeron G530 with DDR3 1600Mhz Ram? ForumNew build, looking for any issues with compat. Forum[Solved] $650 multi-use computer build More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !