You didn't provide any PC specs, which can make a difference for someone to assist you. 

Did you try a System Restore, to a point before you first tried to install the Canon installation software?  That's another option.  Finally, depending on your Operating System, because of the viruses (and if you had a virus there is a possibility for spyware and other Operating System issues - many potentials without know what has been installed on the PC) you may have to reinstall Windows, or if you have XP, do a Windows XP Repair, or even to the point of doing a "clean" install - reformatting the hard drive and reinstalling everything.

System Restore has saved my rear many times.  It makes me look like "super tech"

Whenever I install any new programs, hardware or software updates, the first thing I do is manually set a Restore Point.  Then if there is any problems I can fall back.

I'd follow Fireberd's advice for setting a restore point manually.  Then you might try to add the device manually, and then select the cd rom drive as the location to install the driver from.  Just a thought.  Good Luck either way,

Printer installation problems must be a North American plague.  I've had a week of misery after my HP psc1210 was no longer being recognized by Win XP Home.  I'm not sure what messed up the system but here's what I have found.  For HP printers, and I expect for other brands as well, the Printer Spooler and Remote Procedure Call (RPC) Locator seem to be essential to printer installation. 

I finally got the Print Spooler working by right-clicking My Computer in the Start menu.  Click on Manage in the pull-down menu and then click Services and Applications and then Services. Find Print Spooler or SPOOLSV.EXE and right-click to get Properties. In the General tab ensure that the Startup type is Automatic and the Service status is Started.  Similarly, for the Remote Procedure Call, right click to get Properties and then work through the 4 tabs at the top to configure it as Automatic, Started.  It should log on as a Local System Account in the Log on tab. In the Recovery tab, make sure that Restart the Service is selected.  

Once these services were working, I got the printer installed by:

1. Disabling the network adapter (or modem)
2. Disabling Zone Alarm (or similar firewall software)
3. Disabling Norton Anti-Virus (or similar software)
4. Connecting the printer cable and turning on the printer.

The Hardware Wizard recognized the printer instantly and installed the proper drivers.  The secret for me was to disable firewall and anti-virus software before connecting the printer and turning it on.  Before turning off the software however, you must disable your modem/network adapter.

Hope this works for other folks.

I think the first clue is the RPC - sounds like your system has been infested by some malware, scripts that is exploiting the infamous RPC exploit. Are you fully insured/covered? Are you using a suite of preventative tools like the ones below? If not, consider doing that first before you continue your printer install attempt.  If you are, then consider restarting in safe mode and installing there.  The other is just plug in the canon and let XP find the drivers and or prompt you for the CD to install the drivers. If XP auto installs the drivers included in XP, you are set to go, which is often the same driverset on the CD. You can then do another install from the CD probably from safe mode and reinstall.