I was surfing the internet tonight when all of a sudden I get some notification about a scanning my computer which inadvertently was a trojan of some sort. I found the source and deleted it. Now, if I try to open any program, it goes to the prompt where it says please pick which program you would like to use to open this file. Only way I can get any programs to work is if I run it as administrator. What do I do to get everything back to normal so that all my programs open like they should and my browser opens the internet as opposed to open a prompt to open a file with a chosen program. Thanks!