Repairing/Rolling back the UPnP Device Host Service on Windows 7

Recently, when I've brought my computer out of sleep (not every time; seemingly at random), I've noticed that the uPnP service (via scvhost.exe) starts chewing up 25-40% of my CPU power indefinitely. This issue is only stopped by restarting
the service manually or sleeping/waking my computer again (which is essentially the same thing). I'm assuming that this is a side effect of an update I did in the past few months, since this problem has only manifested recently. As far as I can tell from
my research so far, there is no fix to this problem (I found one Microsoft article that suggested replacing the hosts file, but this had no effect), so I'm now wondering if I can just 'reset' my uPnP service back to the initial Windows install configuration.
Does anyone have any idea how I would go about doing this?
I'm running Windows 7 on a VPCSA Sony Vaio, btw.

Hi，
A high CPU for scvhost.exe can be caused by many reasons, instead of replacing the uPnP service, I suggest you use
Process Explorer to view the detailed process CPU information in your system.
Here're some reference links you can refer to
http://technet.microsoft.com/en-in/sysinternals/bb896653.aspx
http://blogs.technet.com/b/yongrhee/archive/2012/06/28/how-to-troubleshoot-service-host-svchost-exe-related-problems.aspx 
Meanwhile： make sure to keep the latest driver for your devices
If you have a restore point, you can perform system restore to return the system to a previous point at which your PC is functioning fine. it will reset the UPnP service to a previous state.
Yolanda Zhu
TechNet Community Support

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