Here is some great information from Tony Klein, Texruss, ChrisRLG and Grinler to help you stay clean and safe online:
http://boards.cexx.o...topic.php?t=957
http://russelltexas....re/allclear.htm
http://forum.malware...wtopic.php?t=14
http://www.bleepingc...topict2520.html
http://cybercoyote.o...not-admin.shtml
ewido is a great program but it does use some resources. Once the trial is over you can update and use the scanner for as long as you wish, but unless you purchase it you should turn it off completely so it does not run unless you start it manually.
System Restore does not know the good files from the bad. In case bad stuff has gotten into your System Restore files, follow the instructions in this link to get clean System Restore files. Turn it off, reboot then turn it back on:
http://service1.syma...src=sec_doc_nam