Wireless printing no longer working after installing HP 2.7 update

I have been using wireless printing from my Macbook Pro (running Lion OSx 10.7.2) fine until yesterday when it just stopped working out of nowhere. From looking on the forums it appears that this is probably a result of the HP 2.7 update (which I also had the issue of continuously re-appearing in my software update list even after installing it multiple times - though i was able to resolve this courtesy of this forum). I've tried re-installing the printer multiple times and it works fine when connected via USB, it acnowledges that the printer is connected to the same wireless network as my computer bu

OK, before you dive any more into the registry, a simple question. Did you try uninstalling iTunes, rebooting, and re-installing iTunes?
I do have an entry for 'iTunes.Application.1' (below). However, I'm sure there are many more registry entries related to iTunes. In other words, adding this entry will probably not be sufficient to restore the COM functionality.
Windows Registry Editor Version 5.00
[HKEYCLASSESROOTCLSID{DC0C2640-1415-4644-875C-6F4D769839BA}]
@="iTunes Class"
"AppID"="{F98206B5-F052-4965-9FA0-85F61BC3C19D}"
[HKEYCLASSESROOTCLSID{DC0C2640-1415-4644-875C-6F4D769839BA}LocalServer32]
@=""C:\Program Files\iTunes\iTunes.exe""
[HKEYCLASSESROOTCLSID{DC0C2640-1415-4644-875C-6F4D769839BA}ProgID]
@="iTunes.Application.1"
[HKEYCLASSESROOTCLSID{DC0C2640-1415-4644-875C-6F4D769839BA}TypeLib]
@="{9E93C96F-CF0D-43f6-8BA8-B807A3370712}"
[HKEYCLASSESROOTCLSID{DC0C2640-1415-4644-875C-6F4D769839BA}VersionIndependentProgID]
@="iTunes.Application"

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This question was solved.
View Solution.

Hello @LindaGrace,
Welcome tot he HP Support Forums!
I understand that since re-adding a password to your wireless router your HP Officejet Pro 8500A e-All-in-One Printer is not communicating wirelessly with your Mac OS X 10.9 computer. I would like to assist you today with resolving this wireless communication issue.
Now, making a change to your network, such as a adding a password or altering a password, results in having to reconfigure your printer on the wireless network. At this point your printer is being 'blocked' access to your wireless network due to the change that you made. To correct this issue you simply rerun the wireless setup for your printer to 'tell' the printer the network name and password. Once the wireless setup is run successfully everything will continue working for you as per normal.
To run the Wireless Setup Wizard on your printer please follow the steps below.
On the printer touch screen, touch the Right Arrow () to display the second navigation screen.
Touch Network () to open the Network Menu screen.
Touch Wireless.
Touch Wireless Setup Wizard, and then touch Continue.
Wait while the printer searches for routers that are within range. The Select Network (SSID) menu displays.
Scroll down the list of network names until you find the name of your network.
Touch the name of your network.
If prompted, enter the WEP or WPA key. This is the password for your wireless. The password is case sensitive.
Wait for the printer to connect to the network
- Source
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1. Click the Apple menu, and then click System Preferences.
2. Click Print & Scan, and then check if the name of your printer displays in the Printers list.
3. If your printer is already listed, remove and re-add the printer to confirm communication with the Mac. Click the name of your printer, click the minus sign (), and then delete the printer
4. Click the plus sign (), click Add Printer or Scanner, click the name of your printer
5. Click Add to add the printer to the list.
Now that the printer is successfully configured on your network and added to the Mac please try wirelessly printing again.
Please respond to this post with the result of your troubleshooting. Good luck!
X-23
I work on behalf of HP
Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
Click the "Kudos, Thumbs Up" on the right to say "Thanks" for helping!

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