WMP300N uses excessive CPU

Question

On a fast dual core processor, WMP300N can chew up half of the cycles.
This executable becomes active when LinkSys Monitor is used to manage the WMP300N PCI Adapter.
On the Linksys Wireless-N Products page
http://www.linksys.com/servlet/Satellite?c=L_Promotion_C2&childpagename=US%2FLayout&cid=1144421946975&pagename=Linksys%2FCommon%2FVisitorWrapper
The WMP300N adapter isn't even listed.
Even when there is no network traffic at all, WMP300N chews up about 20% of the cycles, so I set about to find out why. Pretty simple, really ... just run sysinternals Filemon.
http://www.sysinternals.com/
Download:
http://www.sysinternals.com/Utilities/Filemon.html
And you'll see wcmp300N chugging thru %windir%\temp looking for GIF files for every Beacon Interval.
Pretty silly ... When can I expect a fix for this?

Answer 1

There are a number of discussions here looking at the different possible avenues. A quick troubleshooting would be to:
If you do not want/need to sync over wireless then disable it (uncheck the “Sync with this iOS device over Wi-Fi.” when you have your device connected to iTunes). There seems to be quite a few issues with the APSDaemon.exe.
Run the Diagnostics in the Help menu of iTunes and chack any issues using the help button.
See what is using up the CPU & Memory besides APSDaemon.exe in Task Manager.
If your Security Software is also constantly active see a) and b) below.
a) http://support.apple.com/kb/TS4123 [Not an issue for me]
b) http://support.apple.com/kb/TS3125
c) https://discussions.apple.com/thread/3540485?start=15&tstart=0
In my case it appears to be Kaspersky Internet Security 2011 (avp.exe) fighting with Apple Push (APSDaemon.exe) on my Windows XP Pro box. I am not set up with the “Sync with this iOS device over Wi-Fi.” but APSDaemon.exe is running anyway. If I kill it in Task Manager the CPU resource usage drops to normal. No cure yet, just work arounds.