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<blockquote data-quote="christophe" data-source="post: 92392" data-attributes="member: 27030">I had that with my Nova T 500&nbsp; and pinpointed it to usbport.sys in the system thread&nbsp; (using sysinternals process explorer, now a microsoft product) using almost all CPU time... (funny enough, when stopping it manually in sysinternal process explorer, no more stutter, but i couldn't stop the PC anymore...)I am running XP SP2. Usbport.sys was version 5.1.2600.2180 if i recall correctly.On my system, getting a newer usbport.sys from Microsoft (such as the one you get by installing <a href="http://support.microsoft.com/kb/918005/en-us" target="_blank">http://support.microsoft.com/kb/918005/en-us</a> ) fixed the problem.I since changed it to a Pinnacle PCTV Dual DVB-T Pro PCI with similar functionnalities but not problem whatsoever (and it doesn't get redected when coming out of standby, so you don't have to restart MediaPortal...)Hope this helps <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /></blockquote>

[QUOTE="christophe, post: 92392, member: 27030"] I had that with my Nova T 500 and pinpointed it to usbport.sys in the system thread (using sysinternals process explorer, now a microsoft product) using almost all CPU time... (funny enough, when stopping it manually in sysinternal process explorer, no more stutter, but i couldn't stop the PC anymore...) I am running XP SP2. Usbport.sys was version 5.1.2600.2180 if i recall correctly. On my system, getting a newer usbport.sys from Microsoft (such as the one you get by installing [url]http://support.microsoft.com/kb/918005/en-us[/url] ) fixed the problem. I since changed it to a Pinnacle PCTV Dual DVB-T Pro PCI with similar functionnalities but not problem whatsoever (and it doesn't get redected when coming out of standby, so you don't have to restart MediaPortal...) Hope this helps :) [/QUOTE]

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