If you have a suspicious file on your system that your current virus protection or spyware program is ignoring, upload the file to VirusTotal. Virus Total uses 35 anti-virus/spyware program’s to take a look at the file and report what it finds. Some of the top programs from the major software vendors are included. The best part is that the scan is free.
There is one statement on the VirusTotal website that says it all:
Currently, there is not any solution that offers a 100% effectiveness rate for detecting viruses and malware. You may become a victim of misleading advertising, if you buy such a product under those premises.
Your best protection is to use a combination of different software programs and do not rely totally on one product. If computer users would practice this safety procedure, their systems would remain relatively bug free.