What is the size of the virtual hard disk itself? Go into the VM settings (without trying to start the VM). If the disk is larger than 19 GB (a distinct possibility for a server) you may just want to move it to removable disk and move it back when you've cleanit D: Look for a swap file or hibernation file. ( Windows may be warning of low disk space - is this the case??
Also it looks like you've confused two threads you started. This causes great confusion for anyone replying.