If you went to start> search> for files and folders, and deleted them from there you can go to your recylcle bin and restore those, unless you have emptied the bin. If this is the way you deleted your temp. files, you need to know that there is a much safer method for this, right click on Internet Explorer> properties, and the first tabb should be general. Under general you will find the options to delete cookies, files, and settings. If you restore the files that you deleted and still have problems, there is a good possibility that you have an infection.
If you are using Norton for your anti virus and fire wall alone, it isn't enough now days to protect you, most everyone here will suggest that you also have an anti spyware, adware, and malware. There are freeware programs that have good reputations and are easy on the resources, and easy to use. Below is a list of freeware programs that you can download.
Spyware Search and Destroyhttp://www.majorgeeks.com/download2471.html
Ewido Security Suitehttp://www.download.com/Ewido-Security-Sui...4-10326287.html
If you don't use the Norton firewall, Sygate works well.http://www.pcworld.com/downloads/file_desc...,RSS,RSS,00.asp