Hi,
Apart from the AV scan or malware scan, I'd suggest the following
- Disable any unknown add-ons in Firefox and other browsers.
In Firefox, go to tools -> Add-ons.
- Check add/remove programs
Go through Add-Remove programs, go through the list to look at anything you haven't installed on don't want, like toolbars or add-ons. just uninstall them.
- Check processes running
Look at the processes running and see if you can spot any strangely named processes.
For windows xp, click on start->run type msinfo32
for windows 7, its described here
http://www.techrepublic.com/blog/win...windows-7/3340
or you could download process monitor from microsoft
http://technet.microsoft.com/en-us/s.../bb896645.aspx
- Check startup programs
Look your registry hive for programs that are loaded on startup or if you're not familiar with registry editor,
in windows 7 or windows xp, type msconfig in start, run. Click on the startup tab.
that'll show you which programs are marked to load on system startup.
this is where usual malware or unauthorized software create entries so they run in memory. Disable the ones that don't look legitimate.
This may not list all programs, so open the Hive
HKEY_LOCAL_MACHINE\SOFTWARE|Microso ft\Windows\CurrentVersion\Run
look at the programs listed on the right. if something doesn't look legitimate, highlight it and delete.
but use the registry editor with caution. If you're not familiar with it, don't use it.
you can also install windows defender which is free from microsoft to work with your anti-virus software,
make sure the windows firewall is turned on for all your wireless or lan connections,
or use system restore to restore the system to the state before when you went to those websites.