This is very new thing, affecting lots of computers. The worst happened to mine and I still have not recover completely. You have been infected with the Smitfraud virus....
You need to download the smitfraudfix program and follow the instructions to a T. You also need superantispyware professional.
Likely you also have been infected with other things... as I have.
I am bringing in my computer to a technicians tomorrow.
Here is a more detailed explanation of how to fix your clock problem:
Smitfraud attacks show fake antispyware programs popups on your screen and/or a balloon popup from the windows system tray displaying a warning message that your computer is infected with spyware (here it is falsely calling it worm.win32.netbooster) and telling you to purchase, download & install their program to remove it. Often, it will hijack your desktop and publish a warning message in big letters (with their weblink) on your desktop wallpaper. The infection will usually alter the settings of your current virus protection software (including Norton and McAfee) and render it powerless to delete the infection. The Smitfraud application will also typically disable your ability to launch the task manager with the alt-ctrl-del keys, too.
DO NOT BUY THE ANTISPYWARE PROGRAM THAT IS BEING ADVERTISED ON YOUR WALLPAPER AND IN THE POPUPS. The creator of the bogus popups is an affiliate of the particular antispyware program they are promoting, so each time an unsuspecting user purchases the advertised program in hopes of removing the trojan the person behind the attack gets paid. Not a very ethical way of selling an antispyware, antivirus, or other computer pest removal product.
Here is the 100% FREE solution I found on
http://www.bleepingcomputer.com that worked for me:
1. Download and install the Smitfraudfix tool in the link below.
http://siri.urz.free.fr/Fix/SmitfraudFix...
2. Download and install Super Antispyware. Update definitions.
http://www.superantispyware.com/
3. Run both programs (Smitfraudfix first) after you start your operating system is in safe mode. Follow the instructions carefully for Smitfraudfix. Allow Super Antispyware to quarantine whatever it finds.
To learn how to run your operating system in safe mode:
http://www.bleepingcomputer.com/tutorial...
3. Reboot in normal mode. Run the Bit Defender online scan (no download necessary). Allow it to quarantine whatever it finds.
http://www.bitdefender.com/scan8/ie.html
4. Download and run RogueRemover. Select "Scan" and follow the steps indicated. It didnt find anything for me, but it comes highly recommended.
http://www.malwarebytes.org/rogueremover...
You can continue to follow-up with Spybot and AdAware if you desire. Of course, you should also keep your regular anti-virus software up-to-date and scan regularly; hopefully it will be working well again after the infection is removed. Be sure to restore the settings which the Smitfraud program altered. Smitfraud apps are quite nasty, and it may take a while to remove all traces.
Good luck!