0
votes
1answer
126 views

Mystery processes maxing CPU Usage

I have recently re-installed Windows 7 following a BSOD incident and I have noticed the CPU usage maxing out occasionally when I am not doing very much (not when it has recently started up). When I ...
0
votes
1answer
2k views

Windows 8.1 Pro - CPU Usage Stays at 100%

About an hour ago, I noticed that my laptop had gotten noticeably slower. My laptop is extremely fast, so this extreme decrease in performance prompted me to look at the task manager. In the task ...
3
votes
1answer
2k views

Root cause for high CPU usage; which measurement to trust more: Windows Task Manager or Process Explorer?

Consider this Windows 8.1 machine (in-place upgrade from Windows 8) with differing reports on its CPU usage. The machine is idle, and has been for 3 days. There are no CPU intensive tasks running ...
2
votes
3answers
3k views

Windows 8 Task Manager: how to enable the “CPU Time” column in the Processes tab?

Up until Windows 7, the Processes Tab of the Task Manager would allow you to add the CPU Time column (see for instance Task Manager's possibilities you may not know): to show it, choose theView ...
0
votes
0answers
33 views

rundll32.exe : infected examples pushing cpu to %100 . Malware bytes couldnt detect it niether could Win Def how do i fix it [duplicate]

My laptop is almost useless. The rundll32 application is infected with malware. I have tried several malitious software removal tools all for nought.
0
votes
0answers
252 views

Why is the clock speed readout greater than the maximum?

(click for full-size image) What is this madness? (I'm aware that the top number refers to the non-Turbo Boosted clock speed, but what of the others?)
0
votes
1answer
5k views

My cpu usage increased to 100% and my computer works slowly after dis assembly

Yesterday, I opened the case of my computer and cleaned the cards and other devices. When I re-assembled the computer and powered it on, Windows 7 works very slowly and the CPU usage in the task ...
1
vote
3answers
966 views

How To Determine Which Tab In Internet Explorer Causes High CPU Usage?

I have high CPU usage in one of a few iexplore.exe *32 processes that i see in Windows Task Manager. Is there a way to identify which tab causing CPU spikes just like it is possible in Chrome? ...
3
votes
2answers
392 views

Windows 7 CPU usage after update

After windows 7 updated and restarted it shows 98-100% CPU usage in task manager. But, it doesn't show any heavy process or thread using it. Are they hidden processes that the task manager doesn't ...
1
vote
1answer
715 views

Task Manager: Overall cpu usage + idle process cpu usage > 100%

On Windows XP SP3, in Task Manager I assume that the "System Idle Process" is not counted as part of the overal "CPU Usage", therefore at any time the sum of both should be 100%, which seems to be ...
4
votes
2answers
541 views

Why is Kaspersky's CPU activity not shown in process list?

So, when Kaspersky Internet Security 2011 (11) starts doing a full scan, I can see my CPU activity going to 100%. However, the KIS process only takes 02% according to Task manager, how is this ...
1
vote
2answers
453 views

How much history does CPU Usage History in XP's task manager show?

Could anyone tell me how much history, in time (e.g. seconds or minutes), the CPU Usage History panel in the Task Manager show (see the image below)? I'm particularly interested on the XP, but also ...
1
vote
2answers
559 views

CPU utilization from 60 to 100% when I launch Task Manager in Windows XP

Whenever I launch Task Manager, it shows the CPU utilization is 60% or sometimes even 100%. However, almost instantaneously, it drops down to 10% or less than 10%. Is this normal behavior in Windows ...
9
votes
3answers
14k views

Task Manager shows 100% CPU utilization, but nothing in process list does

I'm using WinXP, and I notice that in the Task Manager, on the Performance tab my CPU usage is 100%. But When I go to the Processes tab, and sort by CPU System Idle Process is taking up 90%. I've ...