Reset my desktop backc to the original settings

Remove any DVDs or CDs from the optical drives and then unplug all peripheral devices except for the keyboard and mouse.

Click the "Windows" button and then type "eMachines recovery management" into the search box. Click on "eMachines recovery management" in the results list and then click the "Restore" tab.
Click "Password Settings" and then type a new password into the text box.
Click "OK" and then click "Restore System to Factory Default".

Type the recovery password into the "Password" text box and then click "OK". Click "Next" To start the recovery process.

Click "Finish" and then wait for your computer to restart.
This procedure could take several minutes. Once your computer has restarted, you'll be prompted to create a new user account, enter the date and time and set up the internet settings.

or if you are running XP

If you set your machine back to eMachines factory settings, it might help you for a short while but if you don't have effective virus protection your problems will return in short order.

You should get rid of this virus with an effective virus remover.

You can run Bitdefender's free online scan which doesn't need to be downloaded http://www.bitdefender.com/scan8/ie.html

If you know when you got the virus, you can do a system restore to a time before the virus was on your system. This article tells you how to run it from safe mode http://bertk.mvps.org/html/safemode.html

Your best protection in general is a complete internet security suite such as Bitdefender or Norton internet security 2009.

More information here http://www.ask-the-computer-doc.com/comp...

If you need to totally rebuild your system and you don't have a recovery disk, contact eMachines to get one.

You might also try a Windows repair install if you have the operating system disk. Follow the directions here for XP http://www.michaelstevenstech.com/XPrepa...
Source(s):
http://www.ask-the-computer-doc.com/comp...

hope this helps