I had to clean virus off PC by unistalling serval programs and tried downloading anti-virus program that made things worse, now I am getting this error message:
the instruction at "0x00439d62" referenced memory at " 0x00000000". The memory could not be "read".

How do I clear this off without having to download another so call anti-virus program?

if platinum caused this a uninstall reinstall will fix it..

if that does not fix it,it was cause by something ye uninstalled after the virus..

The error that you are getting is a Microsoft issue. You will have to search their knowledge base to get the answers you need on how to fix this.