For the last two weeks one of my virtual server which has been installed with windows server 2008 R2 Standard 64 bit , C : drive is running out of space. Since its a virtual so previously i go to the vcenter & select the settings & increase the space but now option is grayed out. If I go the the disk-management the extend option is also grayed out in C drive.If I restart the server then i get some space which is near to 200mb & within few minutes again the C drive shows 0 bytes available. I have attached a few images of the server. Its a database server for SCCM 2012 server. Only SQL is installed in it.