Boom, the svchost countdown is eliminated until you restart the PC or after some time passes.
The only time I ever got infected with a virus was when I brought a floppy disk home from my highschool PC lab ... which was infected and I didn't have an AV on my new PC (1995). The instructor gave me his copy of Symantec AV to remove it , because it was his fault the systems were infected in the first place. Don't remember the name of the virus though.
To my credit, that was my first Windows-based PC and I've only had it for 2 months...