Can't Open Sophos Interface

I am currentyl having a sorts of trouble on my laptop.  When trying to open up the sophos interface, it says savmain.exe is corrupted along with many other files.  Before everything started going downhill, there was a Trojan the scan picked up, but then it would no longer scanned.  Sophos is operating, but will not allow me to actually open up the program.  It also sometimes pops up that malware is present.  I really need help with this.

Thanks