AVG free can be downloaded here

Avast home free can be downloaded    here

clamwin free can be downloaded     here

Online Active scan from Panda here

Online active scan from Trend Micro here

Antispyware programs   

 

Superantispyware can be downloaded here

Avg antispayware free can be downloaded here

spybot search & destroy can be downloaded here

Online Spyware remover xblock can be found here

 

All the above will help you remove virus/spyware on your computer  for free.