Recovery From Invasion By Hard Core Porn And Virus

Hello, I have not had use of my main computer for about two weeks. I would preface this with the fact I am not proficient with computers as so many programs assume one is and I am 76 years old, a retired educator with advanced work, but at this point I am exasperated to say the least.

I had my computer on working when suddenly things went sorta crazy giving me the impression what I was attempting to get off my computer was an invasion of hard core porn, a virus, and a security program I had never heard of. My screen went black and could not be rebooted at all. I came to this spot, got a little advice, but it did not solve my problem. I found a program I thought would help, paid for the extras, but found it was not as indicated. It said it had help 24/7 (not) and expects one to know computers to use it. It says they have a "WE fix it for you" portion. How that works I have not figured out yet. The phone numbers given are not for service but are for some group this program is published thru I think. After a lot of By guess and By gosh I did manage to get to a home page that showed icons that gave me the interpretation of their pictures and names were as I suspected exactly. I finally got the program for security to desist. The screen disappeared to precipitate my efforts to use the PowerSuite 2010 (their help is by internet), CA Suite 2008 which I had paid to update to current time, My XP disc that wanted to doubt I owned and requested I put Windows 98 in to prove it and then it was on a merry-go-round asking me to insert the previous disc in whichever one it was. It has said XP was not right I am sure because the computer came with Windows XP Media which I had updated