Will Downloading An Antispyware Program And An Antivirus Program Mess Up My Computer?

A few weeks ago, I installed a few antivirus programs and a few anti spyware programs, and it totally crashed my computer. Would it be okay to just have one antivirus program and one antispyware program? Will that crash my computer or not?

A New Unique Multicore Antivirus & Antispyware Product

A new unique MultiCore AntiVirus & AntiSpyware product reliably defends PC against computer malware and on-line threats at unsurpassed, highest security levels.

A MultiCore AntiVirus & AntiSpyware product ( http://www.nuwavesoft.com ) effectively prevents, stops, and eliminates computer viruses and spyware. The revolutionary underlying software technology enables multiple antivirus and antispyware scan-engines running on the same [...]