[Skunkworks] Backup

Hi skunkers I've got a problem with my comp, my c drive has run out of space I need to install Partition margic so that i can increase size of C but I cannot because there is no enough space for this instalation. Some of the S/Ws cannot be uninstalled reasons low disk space for the processes. The only way out is to format the C drive to create space but I have a software installed on the machine that I dont want to loose. Is there anyway I can make its backup since I lost its installation disk and to get another is going to cost me alot thanks alot