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Over the past week, my Windows 7 Home Premium computer (8gb RAM, 64bit) has been running slowly. When I look at my processes, there are always 2 rundll32.exe's running taking up 3 & 25% CPU power, memory slowly creeping upwards from around 115mb to 160mb each in the time it has taken me to right this message, sometimes popping upt o 300mb and back down. Svchost.exe is at 260mb.

When I end those processes, everything returns to snappiness.

I recently did some Windows Updates, and I think it was around the time my computer started acting slowly, but I can't remember if it was before or after the updates that things started running slowly. Last night I ccleaned & defrag'ed.

How can I diagnose what's causing the slowness?

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You first need to work out what DLLs they're actually running. In Task Manager: View, Select Columns, Command Line. – Rup Jun 11 '10 at 18:41
Did you try a virus scan? It's a long shot, but i would definetly give it a try. – PeterK Jun 11 '10 at 18:41
reinstall windows – humbagumba Jun 11 '10 at 18:43
I thought I fixed this, but apparently not. Here's complete info from the Command Line in Task Manager: rundll32.exe C:\Windows\system32\inetcpl.cpl,ClearMyTracksByProcess 10554 There are 2 of those running, taking up 150K+ memory & 10% CPU. They seem to run after I use something with Audio &/or Video, e.g., Zune, GoToMeeting, Pandora, but I can't pin it down to any one application. – Joe Fletcher Jun 23 '10 at 19:31
PS, I ran a virus scan (Norton & Panda), but nothing. – Joe Fletcher Jun 23 '10 at 19:32
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2 Answers

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Try Process Explorer from Sysinternals. This will give you a lot more info about the processes than the Task Manager will. You should be able to deduce what the processes are tied to from there.

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I wouldn't be suprised if there is something malicious attatched to the process, look more into it with the aforementioned process explorer and it would be a good idea to run a virus scanner that's not already installed. I recommend temporarily using panda cloud antivirus.

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