tried to install antivirus program but now my computer tells me that I need a file called sirC32 and I cannot start any other apllication If anyone of you know about this please tell me.
you problably have a virus call W32/Sircam.
you can read about it at Norton, Mcafee, Panda, ...
(if you can“t use the browser try to rename the file run32.exe to rundll32.exe).
That would be the infamous SirCam32 virus... take a look at www.antivirus.com for info and a free tool to get rid of it... it is the Trend Micro site.