Installing anti-virus software to scan Windows partition
First-time poster, first-time Linux user, so I'm not sure if this should be in the "Newbie" section or not, I'm trying to educate myself on Linux over the last few days. My situation is this: I got a pretty horrendous virus that crippled my computer last week. I managed to boot up from a linux live cd which allowed me to back-up all my important files to a second hard drive in the event I have to reformat the C drive. I'm trying to avoid reformatting however and I'd much rather wipe out the virus. The virus has disabled all antivirus software in Windows. Therefore I want to scan the Windows partition from Linux but I don't quite understand the process of DL'ing and installing linux software. From what I gather ClamAV has the capability to do what I want but I'm not sure how to run it once I install it, or even how to complete installation for that matter. (I couldn't figure out how to get firefox to run either after downloading that.) I know it's not like Windows where you just open the .exe file and away you go.
So this is a pretty broad question but can someone briefly walk me through the process of installing and running an app in Linux?