porn sites in the favorites folder..and cant be deleted

My father in law opened an email the other day and clicked a link (I know, Ive tried to tell him) and it took him to a porn site...now this is on his work laptop, and he has three different porn sites in his favorites folder that when deleted, come right back after he starts up again. I cant find a trace of these anywhere and was wondering if you guys could tell me how to get these out of his favorites for GOOD?

Thanks!

 

1st install spywareblaster to help prevent this from happening again
verison 3.1 is on my site

so go to www.supportcave.com
run cwshredder
then x-cleaner

the run hijackthis
save to my docs or a downlaod folder

when open click scan
the save the log copy and paste the info here

Also pestpatrol scans the IE favs
got rid of my pertyscan
when i infected my system with it

get a trial version here
http://www.pestpatrol.com/Downloads/Eval/DownloadHomeEvalNew.asp

 

Download & instal Adaware from here
& update it B4 scanning.
In settings under 'scanning,' have it set to
'scan within archives,'
'scan active processes,'
'scan registry,'
'deepscan registry'
'scan my IE Favourites for banned URL's,'
'scan my host's file.'
Also in tweaks under 'cleaning engine' set it to 'Automatically try to unregister objects prior to deletion.'
Remove what it finds by placing a check in the box to the left of the object. Reboot

Download & instal Spybot S&D from here Update it B4 scanning. Go into settings & have it check for Beta releases also & download if available.
After the scan is complete, have spybot fix everything marked RED.
On the page that first opens when you start Spybot there is an option to immunise, you should do this. In the immunise section there is also a link to download Spywareblaster. Download that & you can keep it updated by selecting the same link that you use to download it. Reboot

If they don't fix it then Download HijackThis from here & unzip it into it's own, permanent folder, not a temporary one. Start HJT & press the scan button. When the scan is finished the scan button will change to save. Save the log to a text file & paste it into the body of your post. DO NOT FIX ANYTHING YET.