Does not install the update and continually restarts the computer without finishing turning it on

[Sheyla]

Turns on the screen but does not start the pc completely. Check a box for a few seconds as if it were a virus and then immediately afterwards check the message "attempt to install update" and then "cancel update" and turn off. Then start all over again continuously.

[praveen196]

@SheylaWelcome to HP Community!

• What Version of Windows are you running on your computer?
• What about AntiVirus software - what Antivirus software is installed now and what other antivirus software has ever been installed (even for a trial)?

 I would suggest you try the following steps:
 

Step 1: Check Windows Update history for any pending update

1.   Click Start button > type in Windows Update In the search box and press enter

2.   Click on  View Update History on the left pane

3.   Check for any pending updates or unsuccessful updates

4.   Starting from the most recent dates, find an update for Windows that has failed to install, and then double-click the update to view more information.

5.   Updates that have failed to install will display Failed under the Status column.

Make a note of the update Knowledge Base (KB) number and the error message and let me know

Step 2: Run the Fixit available in the link below to reset windows update components.

How do I reset Windows Update components?

http://support.microsoft.com/kb/971058

Step 3: Now, you may try to install those unsuccessful windows updates manually from the Download center link below

http://www.microsoft.com/downloads/en/default.aspx

Keep us posted,
If you would like to thank us for our efforts to help you, 

Give us a virtual high-five by clicking the 'Thumbs Up' icon below, followed by clicking on the "Accept as solution" on this post, 

Have a great day!