Everything I type is cleared!

Viruses and worms
1

Something is hapening in my laptop. Everything i type is cleared and the avast antivirus dont report any viruses. I cant work. What can i do?.

Help me please

Alonso. From Honduras

2

Test your system against on-line scanners: Trendmicro

I know it’s a generic answer but, can’t you scan your system with antispywares and antitrojans applications?
Ad-Aware, Spybot Search and Destroy, A-squared, Ewido or Microsoft AntiSpyware.