I did a scan this afternoon with AVG Antispware and when it was finished it had found 4 tracking cookies and one called Adware.chitika. For the first 4 tracking cookies it advised "Delete" but the chitika one said "Ignore Once". As I had never seen this warning before I opened up the help page for an explanation. When I closed the help page I noticed that at the bottom instead of saying "Recommend Action" it now said "Custom". As soon as I changed it back to the "Recommend Action" setting which I have always had the "Ignore Once" immediately changed to "Quarantine". I clicked the button and now it lies in Quarantine but now I can't open Firefox. I can open Internet Explorer to get on line.

I googled the Adware.chitika but there seems to be confusion over it.Can anyone here tell me if my AVG Antispyware has been infected as I did not change the setting from Recommend to Custom and am not sure quite what to do now.

Have you tried to perform the scan in SAFE MODE?

If no avail try to delete that cookie as following :

Please download ATF Cleaner by Atribune. (This program is for XP and Windows 2000 only)

Double-click ATF-Cleaner.exe to run the program.
Under Main "Select Files to Delete" choose: Select All.
Click the Empty Selected button.

If you use Firefox browser

Click Firefox at the top and choose: Select All
Click the Empty Selected button.
NOTE: If you would like to keep your saved passwords, please click No at the prompt.

If you use Opera browser

Click Opera at the top and choose: Select All
Click the Empty Selected button.
NOTE: If you would like to keep your saved passwords, please click No at the prompt.

Click Exit on the Main menu to close the program.
For Technical Support, double-click the e-mail address located at the bottom of each menu.