My avast can't detect some virus in my PC

[j3anmax]

First off, i'm sorry my english becaus i'm brazilian and i don't know how to write very well in english  (Brazil rox)

I got some virus in the Net, then i run the antvirus avast and nothing be find!!
I went to a forun about virus and somebody say to me run a scna virus online! The antvirus found 7 virus that the avast didn't find, but unfortunely, the ant virus online dont remove them.  :'(

I want help hurry because many stranges things are happening in my PC. please help!!  :'(
Somebody knows how i can remove this virus! I already update my avast but even, the virus not be detected 

Please help!  :'(

[Spiritsongs]

  Perhaps you have a trojan ( "trj" ) or a worm ( "wrm" );
     if yes, I would suggest you use a good & FREE
     anti-trojan program !?

     If you have a Win 2000 or XP Operating System, try :
     www.ewido.net/en

     If you have a different Operating System, try :
     www.emsisoft.com/en/software/free

     Use of either of these 2 programs will probably
      remove what Avast has not found .

[j3anmax]

I'll try, thanks!!!

but, can i install this antvirus even avast in my pc?? I heard taht 2 ant virus in the same PC maybe dont work!

[Lisandro]

The antvirus found 7 virus that the avast didn't find, but unfortunely, the ant virus online dont remove them.  :'(

Can you post the name and the path of the infected files?
Bem-vindo (Welcome) 

[j3anmax]

Vc é brasileiro tb Tech??? (Are you a brazilian too Tech?)

Olha, eu ja consegui resolver o pro, fiz oq o cara acima disse baixei o ewido, passei ele e ele achou uma porrada de virus q o avast nao encontrou 
è melhor vc informar aos caras ai do avast pra dar uma  revisada!! Esse trojan q peguei "passou a perna" no avast e fez com q ele nao encontra-se esse trojan.

Infleizmente eu nao sei o caminhu completo deles, so sei q ele tava em C:/documents and settings e tb na pasta C:/Winows

flw e abraços!!

[Spiritsongs]

  The 2 programs I recommended are NOT anti-virus
     programs, but are anti-trojan, anti-worm and will NOT
     conflict with Avast .