Several Problems since installing five updates

Question

I installed five updates on 15/09/2014. (Updates: KB2995004, KB2993100, KB2990532, KB2979582, KB2975719)
When I tried to print a document today I noticed that my default printer was missing. It appeared in the list of installed Printers (Control Panel) but not the dialog box. I restarted my computer to resolve this issue.
I then noticed that my audio was not working. I clicked the Audio taskbar button and it started to detect and resolve problems however this was unsuccessful. I tried to manually start the Windows Audio service which gave me the following message: "Windows could not start the Windows Audio service on Local Computer. Error 0x800706cc: The endpoint is a duplicate."
I had a feeling that it could have to do with the recent updates I've installed. I tried to open Control Panel but here's the strange part, it says 'Adjust your computer settings' like usual and then the Control Panel freezes and it becomes blank (all text below the navigation disappears). The only way to get rid of the Control Panel window is to restart Windows Explorer through Task Manager (In PC Settings, similar things happened). Then I did a Whole Computer scan with AVG and it found two threats (.exe files related to EID_pe_iscorrupted, not sure if this has any relation).
I booted up safe mode and Control Panel worked fine, I repeated all the steps above with no success. I went to Windows Update and tried uninstalling the updates one at a time, when it restarted it said 'Failure configuring Windows Update Undoing changes'.
Then I went to Computer > Properties (of the C drive) > Tools > Check. I checked for errors and it told me, 'Windows has found errors on this drive that need to be repaired. Close the dialog box and repair the drive'. Then I tried chkdsk /scan in Command Prompt. It told me to do an offlinescanandfix. I did this and restarted the computer. It was checking the disk and started up in safe mode with no sign of successful checking. I checked Event Viewer and there was nothing reported.
I attempted System Restore in Safe Mode, fortunately there was a restore point created on 12/09/2014. Unfortunately when I tried to attempt this it only restarted again, telling me that it failed and gave me the error code: 0x80070570. I attempted this again after a clean boot and going into Properties of Block Level Engine Backup Service. It still gave me the same error code.
I went back into the normal mode and attempted System Restore and Check drive. This time Windows said there were no errors with the drive and System Restore failed once again (same error code). Thankfully networking features are intact but Control Panel, Audio and System Restore are not.
I am quite unsure if it's the recently installed updates or possibly a virus. 
System Details:
OS: Windows 8.1
Manufacturer: HP
Model: Pavillion 15-n270ea
I've also posted this on Microsoft Community but I need to get help form other forums.

Answer 1

Hey @TTYTOM ,
Welcome to the HP Forums!
I understand after some recent updates you're having issues with your notebook.
Try these steps in safe mode to uninstall and block the update. It sounds like after removing updates your system is still trying to apply something recent.
To do this follow these steps:
1. Boot into safe mode: Windows Startup Settings (including safe mode)
2. Press Windows Key + X.
3. Click Programs and Features.
4. Click View Installed Updates on the left hand side.
5. Click on the Installed On heading to sort by date installed.
6. Click on the update that was recently installed.
7. Click Uninstall at the top.
8. After you've uninstalled the updates test the startup.
If it works, block the Windows updates that caused the issue:
1. Press Windows Key + X.
2. Click Control Panel
3. Click System and Security.
4. Click Windows Update.
5. Click Check for updates to rescan for available updates.
6. Click on # important updates are available. Where # is the number of available updates.
7. Right click on the update and choose Hide update. If the update is not shown, click the Optional tab on the left.
I would also suggest trying a system restore by booting into the recovery drive. Tap F11 on startup and you will be prompted to choose a region. Select US and click Troubleshoot. Click Advanced Options, and then choose the System Restore option. This should work better as Windows is not running during the process to block anything.
Let me know if that works.
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The Great Deku Tree
I work on behalf of HP.