[FLYNNN]

Hello everyone, I'm a major noob at this, but here's what I know. I bought my Laptop brand new December of 2006 and it ran perfect, my laptop ran fine until about 4 months ago. AVG Free kept detecting Trojan viruses which I always sent to the vault. I thought it was destroying the virus and avoiding the problem. After the Trojan downloader messages stopped everything seemed fine, but system started slowing down, over a months time, to the point where it is now. I know it's not disk space because I have 76% free disk space. After that month everytime my laptop turned on, it gave me and still gives me the message, "Windows cannot find 'C:\system32\nsmss.exe'. Make sure that you typed the name correctly, and then try again. To search for a file, click he Start button, and then click Search." I did that exactly and according to the search nsmss.exe does not exist! I believe this is dramatically slowing down my computer, because I have a lot of RAM and disk space, I also have Verizon Fios. Is it possible that my computer still has the virus?!? What can I do to fix this?!? I miss my old laptop that ran at the speed of light, it really is slowing down the way my computer runs... PLEASE HELP!