|Are you sure the printer is powered and switched on?|
Is the printer exibiting any signs that it's in an error state?
E.g. are you sure the cartridges have enough ink? See the manual for the printer if you suspect that.
"...this may have happened after virus scan..."
A virus scan, or other anti-malware scan, would not cause your problem, unless you signified to it for it to remove the things it found, or it did that automatically because of settings in it - did it remove stuff ?
Removing some things could not cause your problem - e.g. cookies.
Some anti-malware software programs , e.g. Spybot, are well known to sometimes make mistakes and remove things they shouldn't remove. What software did you use?
Were you having problems before you ran the scan you thought might be cured by running the scan? If so, what were your symptoms.
If there is an icon that looks like a printer in your task bar, open it up and delete any print jobs pending.
I'm assuming the printer is a local printer - connected to the subject computer directly.
If it's connected to the subject computer directly, you may need to
- delete the printer in Control Panel - Printers and Faxes if it's listed
- un-install any software listed for the printer in Add/Remove Programs
- unplug the USB connection to the printer
- install the proper software installtion for the printer, during which you will probably be asked to plug in the printer's USB connection - do NOT plug in the USB connection to it before that - make sure it's plugged into a USB port it should work with according to my info above - the printer must be powered and switched on in order for it to be detected properly .
If it's a network printer, connected to another computer in your local network, that's a different scenario.