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High CPU usage by HP networked printer, being blocked by SPF?
I need some help with SPF and problems with HP All-in-one devices. I have two network multi-functions (print/scan/fax) which use HP's 'Digital Imaging Monitor' software and Service Location Protocol (SLP).
Here is the primary problem: If SPF is running, a svchost process hosting the HP Pml Driver HPZ12 service has very high CPU usage. If I shut down SPF, all is OK. My HP printer seems to work OK, I can access the various status and settings through the HP Digital Imaging Monitor icon in the system tray. But the computer becomes very slow and unresponsive. In SPF connections tab, I see that the service host has very high 'outbound' byte counts (currently showing 2.2 mil), with much lower 'inbound' byte counts (426 k) on UDP port 427 used by svchost.
I suspect that SPF is blocking status chats between printer and the HP software on my PC.
I also have VIPRE installed, but don't think that is causing any problems.
Any thoughts?
Thanks!
JGK
Here is the primary problem: If SPF is running, a svchost process hosting the HP Pml Driver HPZ12 service has very high CPU usage. If I shut down SPF, all is OK. My HP printer seems to work OK, I can access the various status and settings through the HP Digital Imaging Monitor icon in the system tray. But the computer becomes very slow and unresponsive. In SPF connections tab, I see that the service host has very high 'outbound' byte counts (currently showing 2.2 mil), with much lower 'inbound' byte counts (426 k) on UDP port 427 used by svchost.
I suspect that SPF is blocking status chats between printer and the HP software on my PC.
I also have VIPRE installed, but don't think that is causing any problems.
Any thoughts?
Thanks!
JGK
I’m undecided
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Inappropriate?Here are some steps to get Sunbelt Personal Firewall to let applications connect to the printer. we'll have to temporarily switch Sunbelt Personal Firewall to advanced mode so it can create a rule for your applications.
Please open Sunbelt Personal Firewall. You can do that by double-clicking the purple shield icon, which is in the bottom-right of your screen, near the system clock.
Then, click the Network Security tab, found on the left. Now on the right you'll see a list of applications. Find the one called "Any other application."
Click each of the 4 columns until the columns read ASK ASK ASK ASK. Then click the Apply Button.
Now, try running all your Internet programs now. Notice Sunbelt Personal Firewall will pop up with a dialog box that asks you to click "PERMIT" or "DENY" to an application. Be sure to CHECK the checkbox above these choices so you can make a rule for this application, and then click the "PERMIT" button. Do this for each time you receive the message. Use your programs as normal for a few minutes until you are sure you've got every program setup.
Sunbelt Personal Firewall has now made a rules for these programs. Go back to Sunbelt Personal Firewall where we were and change "Any Other Application" back so they read in this order: DENY PERMIT DENY PERMIT by clicking each of the 4 columns until they are changed to those values, then click Apply.
Sunbelt Personal Firewall is now back in Simple mode, and the printer should work correctly.
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this answers the question
