Hi,
Let's place the computer in software clean boot state and install the update. Also perform hardware clean boot before installing the update.
Perform the steps provided here.
Method 1:
Place the computer in clean boot and check for the issue.
How to perform a clean boot to troubleshoot a problem in Windows Vista, Windows 7, or Windows 8
http://support.microsoft.com/kb/929135
Note: Once you are done with clean boot, please follow the section ‘How to reset the computer to start as usual after troubleshooting with clean boot’ under ‘more information’ in the article to put your computer
back to normal startup.
Method 2:
For doing hardware clean boot following the below steps:
a. Unplug all the external Devices.
b. Start the System in Safe mode.
c. Go to Device manager.
d. Press Windows key + R.
e. Type 'devmgmt.msc' and hit ENTER.
Reference link to boot to safe mode.
http://windows.microsoft.com/en-IN/windows-8/windows-startup-settings-including-safe-mode
Device that can be disabled for doing a Hardware clean boot are
• Sound Card.
Hope this information helps.