Ubuntu changed my windows partition drive letter, how to retrieve the windows partition name?

view full story

http://askubuntu.com – My laptop came with Windows 7 preinstalled, some files (apparently vital windows) was infected by a virus. My antivirus has moved the infected files to quarantined, and since Windows can no more start. I installed Ubuntu over it, which renames the partition of mn hard drive "C" to "E". How can I retrieve the name of my Windows partition after after the changes made by Ubuntu? Thanks a lot. (HowTos)