Try the following to "hide" Drive H: Right-click the Start button and click "Command Prompt (Admin)" At the Command Prompt type the following and press "Enter": mountvol H:\ /D Close the command prompt. Here is some info on Mountvol, it is very powerful be cautious using it: [URL]  
what is winretools,It has apperead has a new drive,I haven't done any partition on my HDD,just updated my support assistant can anyone tell me why has this appeared and what do I do next,should I delete it or just leave it?
what is winretools?