what do computer virus' do to laptops?

[danfifepsu31]

what do computer virus' do to laptops?

 

[Demosthenest]

depends on the virus. Can do many many things.

 

[danfifepsu31]

like what? how do I have virus' detected for free?

 

[Demosthenest]

from slowing things up to destroying data, corrupting windows installation...
do you have an anti virus?

 

[rgd1101]

like what? how do I have virus' detected for free?

what the os?