Will System Restore delete all my files and another way to remove Adware.OneStep?

I know this question may sound silly to those people who know all about computers. But I’ve just had Norton Internet Security pop up saying something like: “Norton Internet Security has found sercurity risk: Adware.OneStep.”
I’ve been following the steps on Symantec, on how to remove Adware.OneStep, but I don’t know what they’ll do to my computer. I don’t want to lose all my work!

Adware.OneStep Removal Instructions For Xp
Go here for detailed instructions with screen shots?

http://www.malwareexorcism.com/search/label/Adware.OneStep

1.Download and run this free cleaner, choose “Select all” and “Empty selected”.

http://download.cnet.com/ATF-Cleaner/3000-18512_4-89432.html

2.Turn off your system restore! Right click on “My Computer and choose “Properties”,”System Restore tab”,check the box “Turn off System Restore to all drives” and hit apply,Ok.

3.Hit Ctrl Shift and Esc at the same time and bring up your task manager and choose the processes tab and look for onestep.exe, osopt.exe, uninstall.exe, upgrade.exe,and Au_.exe ? Rt click on them and choose end process.If you can’t end the process download this free tool called Pocket KillBox and read the Manual and learn how to use this handy tool.

http://www.killbox.net/downloads/KillBox.exe

http://www.killbox.net/help.html

4.When your done shutting them down click on [File] at the top left corner of your task manager and choose New Task (Run).Type msconfig and hit Ok. Go in BOOT.INI tab and tick both “Safe boot” and to the right of that “Networking” and hit Apply and Close.(It will boot in “Safe
with networking mode” Choose Administrator)

5.While in “Safe with networking mode” download Malwarebytes.

http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html?tag=mncol

(Note)If you already have Malwarebytes installed and it won’t run go in it’s program file and rt click on the red mbam app and rename it mbam.bat then rt click and choose send to-> Desktop (create shortcut) now close out of everything and go to your desk top and use that app to launch M-Bam for now on.

6.Right click on the mbam setup app you downloaded and rename it xxxx then Dbl click on it and install and update it and run a full scan and delete/quarantine all entities it finds and restart if it asks? (Note) If it won’t update use this link to download and install the latest rules.

http://www.malwarebytes.org/mbam/database/mbam-rules.exe

7.Go to Start,Run,type msconfig and hit ok.Go in BOOT.INI tab and untick Safe Boot and then go in the Startup tab and (uncheck) all programs (not) needed at startup (Only check programs you want running all the time like antivirus,IM,etc)”Less is better in this case” and hit apply,close,restart.
Your computer will boot normally and on your desktop a window will popup,check “Don’t show this message” box and hit ok.
(Note)Check here for info’s on startup programs and if you need help watch this video.

http://www.techspot.com/startup/

8.Download BitDefender free antivirus and install,update,and depending on time run either a “Deep System” scan which takes hours and cleans everything or a “Full System” scan that takes minutes and will shut down most malware till you can run a deep scan? When the scan is done delete/quarantine all entities it finds and your done.

http://www.bitdefender.com/PRODUCT-14-en–BitDefender-Free-Edition.html

(Note) Don’t turn on “System Restore” till your sure your clean and everything is running ok.

If you need more battle plans go here.

http://www.malwareexorcism.com/search/label/Malware%20exorcism%20in%20nine%20easy%20steps