I answered a phone call a few months back from a guy who said there was something wrong with my computer. 

The computer had been acting slow of late so I listened and did what he said. I don't remember what keys he said to type in or even where I was going on the computer. But after that phone call my computer was'nt working right at all. 

The most important part is that I cannot get on any websites. I get a message that my virus software is blocking it and I should enable...blah blah...

I did what it said and still the same message. I wound up uninstalling my Norton (after running it for a virus check) software, restarted etc. Still the same message. This is one problem. Another...clicking on any icon I have software installed for does not bring up the program. My pointer is now a capital "I" with a line on the top and bottom of it. Just like when you are typing into a letter etc.

I was thinking of just re-formatting the computer. I have Windows Vista. I don't want to install any of the new Windows formats as I don't want to learn all over again. What do you think that guy that called did to mess me up like this. 

I did go into DOS as he was instructing. That's all I remember. I am a senior citizen & rely on my computer for health reasons i.e. checking in with my doctor. Thank you for any advice you can give me.
Regards, Pat