I asked this question several months ago but didn't really get a definitive answer.
If I have my HD partitioned with the OS on C: and personal data, photo's etc on D:, Can D: become infected with internet nasties? Bearing in mind that Outlook Express and Internet Explorer are on C:. I understand that if I inadvertantly transfer an infected file onto D: then I may have problems. What I'm trying to say is, can a virus infect other partitions unaided?
It's down to the the virus writter what the virus does.
Some viruses scan all drives and folders looking for files to infect, so this might include your D Drive. It might also drop infected files with tempting filenames in amongst your files in locations such as My Documents etc
Decent anti virus will be able to clean these files because if you were to open the files then the system would become reinfected.