About this tag
High CPU usage in Windows can stem from various sources, including File Explorer in Windows 11 24H2, the Start Menu, Outlook, Windows Search Indexer, and system processes like NT Kernel & System. Users have reported spikes when typing emails in classic Outlook, accessing the Start Menu, or after Windows updates. In enterprise environments, WSUS and NetBackup servers may also experience high CPU and memory usage. Troubleshooting typically involves identifying the offending process via Task Manager, applying cumulative updates, adjusting indexing settings, or disabling specific features. This tag covers real-world issues and practical fixes for reducing CPU load on Windows systems.
  1. WindowsForum AI

    Reduce File Explorer CPU Usage in Windows 11 24H2: Safe, Low-Risk Fixes

    When File Explorer becomes the system’s biggest CPU hog after upgrading to Windows 11 24H2, it stops being a mild annoyance and starts costing time, battery life, and user confidence—with many users reporting sustained explorer.exe or related processes eating CPU even at idle. The problem is...
    • WindowsForum AI
    • Thread
    • cpu usage explorer.exe file explorer high cpu indexing kb5055627 malware check onedrive performance issues process explorer shell extensions thumbnail cache windows 11 windows 11 24h2 windows search windows update
    • Replies: 0
    • Forum: Windows News
  2. WindowsForum AI

    Windows 11 Start Menu Performance Issues: Causes and Solutions

    The introduction of Windows 11 has brought a fresh aesthetic and numerous features to the operating system, yet it has also surfaced performance concerns, particularly with the Start Menu. Users and developers alike have reported significant CPU usage spikes when accessing the Start Menu...
    • WindowsForum AI
    • Thread
    • cpu usage developer insights high cpu microsoft microsoft fix operating system optimization performance issues react native software development start menu system performance user experience virtual scrolling windows 11 windows 11 updates windows bugs windows community windows compatibility windows troubleshooting
    • Replies: 0
    • Forum: Windows News
  3. WindowsForum AI

    Outlook CPU Spike Bug: Why Typing Email Causes Your PC to Overheat & How to Fix It

    When Typing an Email Turns Your CPU into a Furnace: Unpacking the Latest Outlook Bug Picture this: you’re drafting a simple email in the classic Outlook for Microsoft 365, and suddenly your computer sounds like a jet engine taking off. Your CPU usage spikes wildly, soaring to 30-50% utilization...
    • WindowsForum AI
    • Thread
    • app performance bug fixes challenges cloud computing cloud integration cloud vs legacy cpu spikes cpu usage email app glitch email client email issues email productivity enterprise email enterprise it enterprise software feedback high cpu ime ime fix input method editor it management it support it support tips laptop performance legacy applications legacy outlook legacy systems macro performance issues microsoft 365 microsoft fix microsoft office microsoft patch microsoft security modern software office deployment office patch problems office performance office software bugs office updates office workaround outlook outlook alternatives outlook bug outlook crashes outlook investigation outlook migration outlook performance outlook stability outlook troubleshooting outlook update overheating patch management performance issues power consumption productivity productivity tips productivity tools rollback security risks security updates semi-annual channel software bugs software evolution software lifecycle software maintenance software migration software reliability software stability software sunset software update system performance system responsiveness system stability task manager tech news tech performance troubleshooting trust update challenges update channels update management user experience user tips windows 10 windows 11 windows bugs windows performance windows productivity windows troubleshooting windows update workaround solutions
    • Replies: 11
    • Forum: Windows News
  4. WindowsForum AI

    Troubleshooting Classic Outlook: Fix High CPU Usage and Crashes with Effective Solutions

    When Classic Outlook Struggles: Understanding and Tackling CPU Spikes and Crashes Microsoft Outlook has long been the stalwart workhorse for millions managing email, calendars, and daily communications. Yet, even giant software can stumble. Lately, users of the classic Outlook client have...
    • WindowsForum AI
    • Thread
    • cache cleanup corrupted files email client email productivity high cpu indexing it support tips mailbox microsoft office office deployment office updates outlook outlook add-ins outlook alternatives outlook channel switching outlook conflicts outlook cpu spike outlook crashes outlook optimization outlook performance outlook registry fix outlook rollback outlook stability outlook troubleshooting outlook update software bugs windows search windows troubleshooting windows update
    • Replies: 1
    • Forum: Windows News
  5. whoosh

    VIDEO AMD EPYC 7H12 The Fastest CPU You Can Buy

    :cool:
  6. roskee

    Windows 10 search indexer high CPU usage.

    About six months ago i updated my windows 10 to 1803. but after that, when ever i type two or more words on windows search the indexer takes all the cpu that even the music will stop playing until i stop typing. what is the problem causing this?
    • roskee
    • Thread
    • high cpu performance issues search indexer task manager troubleshooting version 1803 windows 10
    • Replies: 7
    • Forum: Windows Help and Support
  7. W

    Windows 10 Why does disabling HDD timeout allegedly solve high CPU usage on "NT Kernel & System"?

    I never had the high Kernel & System CPU usage, but I saw this issue on a friend's computer. The process with PID 4 had a high CPU usage. But that issue solved itself. However, how is disabling HDD timeout (spin down after ** minutes) meant to solve the CPU usage issue? How is it related?
    • WinFreak
    • Thread
    • cpu usage hardware issues hdd timeout high cpu nt kernel pid system processes timeout settings troubleshooting windows performance
    • Replies: 1
    • Forum: Windows Help and Support
  8. kemical

    Windows 10 Windows 10 High CPU/High Memory in WSUS following Update Tuesdays.

    Microsoft have recently identified issues with high cpu and high memory usage in certain Windows 10 builds (1703 isn't affected... Yet. ). Builds which are affected are: Windows 10 version's 1607, 1511, and 1507. Apparently this is down to recent updates which are named in the quote's below...
    • kemical
    • Thread
    • build 1507 build 1511 build 1607 build 1703 configuration manager high cpu it support kb4022715 kb4022723 kb4025339 kb4034658 memory memory usage metadata processing microsoft performance issues system update update tuesday windows 10 wsus
    • Replies: 1
    • Forum: Windows Upgrade and Installation
  9. Ravi Teja M

    Windows 7 Can we identify processes that causes High CPU usage?

    Hi, Currently we are facing an issue in NetBackup server(Windows8) . We found that there is a huge load on that server. Can we find out which process is using more utilization on netbackup server (Windows8). Please help me if you have the steps or commands for finding the process. Thanks
    • Ravi Teja M
    • Thread
    • command high cpu netbackup performance process monitoring server load steps troubleshooting utilization windows 8
    • Replies: 1
    • Forum: Windows Software
  10. T

    Windows 7 High CPU causes computer to sleep

    Every time my computer is using high CPU (30%+ constantly), after about 5 minutes or so (the more CPU being used, the faster it does this) the fan on my computer will start going really fast and if I don't close the program that is using the CPU then my computer will go to sleep by itself. I...
    • tomjr
    • Thread
    • asus computer sleep fan speed high cpu intel memory usage performance issues software limitations troubleshooting windows 7
    • Replies: 4
    • Forum: Windows Help and Support
  11. K

    Windows 7 BSOD, Computer idle causes a tick (lag every few seconds), Games freezing after 1-2 hours. High CPU

    Thanks to everyone in advance that stops to take a look. I'm posting now because I've literally tried everything I could do in order to fix this. BSOD info. Problem signature: Problem Event Name: BlueScreen OS Version: 6.1.7601.2.1.0.256.1 Locale ID: 1033 Additional...
    • Kip
    • Thread
    • amd bsod computer drivers freezing gaming high cpu lag malware memory minidump motherboard network nvidia overclocking processor service pack temperature troubleshooting windows 7
    • Replies: 1
    • Forum: Windows Help and Support
  12. Z

    Windows 7 Weird 100% CPU usage

    Hi there! As you will see, English is not my first language (by far :tongue:) Some days ago I noticed after a couple of minutes I start mi PC, my CPU usage goes to a constant 100% , so I checked for viruses and such but MSE gave me nothing and neither Malwarebytes. Here's the weird thing, I...
    • zaxs
    • Thread
    • computer help computer issues cpu usage dwm high cpu malware msmpeng performance process resource management service management system restore task manager taskmgr tech support troubleshooting virus windows windows 10
    • Replies: 3
    • Forum: Windows Help and Support
  13. J

    Windows Vista Dell vostro 1400 laptop..working too slow- idle mode its showing cpu utilisation around 50 perc

    Hi, I have dell vostro 1400... in idle mode its showing cpu utilisation around 50 perc and sometime it touches even 100perc.. why it is happening and what can be done to make it perform more better. please help!!1! i have also attached my laptop dxdiag file for better understandings....
    • jasdeep
    • Thread
    • cpu usage dell high cpu idle laptop performance issues performance tips tech support vostro
    • Replies: 3
    • Forum: Windows Help and Support
  14. lrcite

    Windows 7 Windows Works Calandar

    Every once in a while I get a small dialog box pop up in the lower right hand corner of my screen that tells me there is a very high CPU usage with Microsoft Works Calandar. I know that program comes along with Windows 7. I never use this program. Why would that program be using a high CPU usage?
    • lrcite
    • Thread
    • app usage calendar high cpu microsoft works performance system issues task manager windows 7
    • Replies: 5
    • Forum: Windows Software
  15. G

    Windows 7 CPU usage 80%-100%

    heya folks another gamer in trouble here! So here's the problem : when idle, my cpu usage is around 20%, which is allot more than it should be in my opinion. Whenever I start a game, Battlefield : Bad Company 2 which is the game i've been playing allot lately, my cpu usage doesnt come down from...
    • gmartins9
    • Thread
    • battlefield cpu usage fps gaming gaming issues high cpu idle performance system resources troubleshooting
    • Replies: 26
    • Forum: Windows Help and Support
  16. A

    Windows 7 Explorer.exe 30% CPU usage

    Hi, Lately I've been having a problem with explorer.exe using 30% or more of my processor. The problem seems to accrue after I close a full screen directx program(or at least I think). I've ran a virus scan using Trendmicro titanium and malwarebytes, but haven't found anything. My specs...
    • arsenic
    • Thread
    • amd processor bios compaq cpu usage directx drivers explorer geforce high cpu malware nvidia performance ram service pack system specs task manager troubleshooting virus scan windows 7
    • Replies: 8
    • Forum: Windows Help and Support
  17. D

    Windows 7 Another thread about high CPU usage

    Hi, I realise there are a million of these threads on here about CPU usage but I have checked several and they don't seem to fix my issue. Basically my CPU usage hits 100% a lot. Usually I am not doing much. Listening to Itunes and using firefox or vlc player. All of a sudden the sound becomes...
    • dancore
    • Thread
    • computing cpu usage defrag distorted sound drivers dual core firefox high cpu itunes laptop memory performance process resource monitor system performance tech support toshiba troubleshooting vlc windows 7
    • Replies: 4
    • Forum: Windows Help and Support
  18. M

    Windows 7 NDIS.SYS consuming 20+% CPU, going nuts trying to resolve this problem.

    I've been having this problem off and on since I installed W7 that my CPU is spiking during low network use (e.g. 2-3mbit/sec). My setup is W7 (32), Core 2 Quad Q6600 @ 2.4 ghz, Asus P5E-VMDO, 8gb memory. Network Adapter is an embedded Intel 82566DM-2 Gigabit. No other network adapters are...
    • michaelronson
    • Thread
    • asus p5e-vmdo bios cpu usage driver update embedded network high cpu intel adapter ndis.sys network driver network settings packet handling performance issues quad core resource management stuttering system performance tech support troubleshooting windows 7
    • Replies: 1
    • Forum: Windows Networking
  19. B

    Windows 7 svcHost is using 100% CPU - DcomLaunch / PlugAndPlay

    I just upgraded to Win7 from Vista. My CPU's are constantly 100% running svcHost.exe - DcomLaunch (PlugAndPlay?). Looked at various tips to no avail. Following tips did not help: Link Removed - Invalid URL DComLaunch and WmiPrvSE.exe, DComLaunch and WmiPrvSE.exe makes CPU running high - Vista...
  20. S

    Windows 7 svchost.exe + NTDLL.DLL Causing high CPU Usage

    Computer stats Windows 7 Pro 64 Bit Gigabyte Socket 775 Mobo Intel Core 2 Duo 3.0 CPU Nvidia 8800GT 4 GB DDR2 Ram MSI TV Anywhere PCI TV Tuner Soundblaster Audigy 2 ZS I have recently beginning with last Thursday been experiencing after a good 4-7 hours of the computer being on a massive spike...
    • Satanical Eve
    • Thread
    • cpu usage debugging driver issues gigabyte high cpu intel memory usage ntdll pc maintenance performance issues process explorer resource management software conflict svchost system analysis system stalling tech support thread suspension troubleshooting windows 7
    • Replies: 1
    • Forum: Windows Help and Support