In Windows 7, as in previous versions, there is the ability to have your machine go into Hibernation or power save mode. Whether this is really a valuable option is really up to the decision of each user. As for me, it’s more of a pain than a benefit. The pain part of it for me is that when your machine goes into hibernation mode it creates a cache file the size of everything in your RAM. So, if you have 4 GB of RAM installed on your machine, it creates a cache file that size. This can take up valuable disk space. Here’s how you can disable and delete that cache file.
Open up the command prompt, you need to run it as the administrator. Type powercfg -h on and press Enter. Done.