To solve the problem that Windows 8 operating systems are full of C disks or the memory size of C disks is getting smaller and smaller. At the beginning, win8 systems were used and many operations were not very familiar. Today, we have encountered such an urgent problem: my c disk space is full, and I only have the operating system installed on the C disk, and other software is installed on the other disk. Then, this problem causes my QQ to fail, the document cannot be saved ...... A series of problems have led me to deal with this problem throughout the weekend. First of all, I found many of the same problems, and some of their methods have not been completely solved, then I asked in the group that some people gave me the suggestion that the reason why disk C was full was that it was poisoned. I had to re-build the system, but I was unwilling to re-do the system, this is because I just bought this book at the beginning of this month. It's impossible to get poisoned. I didn't do anything anymore ........ fortunately, my problem is solved. I will share some of the solutions below, hoping to help you with the following: Method 1: the first method is very simple. It can also release disk C, but it also has its drawbacks: after it is released, the disk C will be full again later. This method is: 1. win key + X, select "command prompt (Administrator) (A)" 2. Enter powercfg-h off. Note: This method has drawbacks. Method 2: Release disk space, this method is good, but it may be full again the next day. The operation is as follows: 1. win key + X, select "Control Panel"-"system and security"-"Management Tools" 2. Choose "Release disk space"-select "Disk Operating System"-"OK" to calculate the space release page. 3. Go to the disk cleanup interface, select "files to be deleted"-click "Clean System Files" to release the C disk space. However, this may not take a long time and the C disk space is full. The third method is described below. Method 3: delete the windows blue screen file. The windows blue screen folder name is: windows blue screen file. The location of the windows blue screen file is: C: \ Windows \ minidump, that is, you can clear all the items under the folder to release part of the C disk space. The above are some methods I have summarized based on my own situation. They are for your reference only and different methods are used for specific situations. If I cannot summarize them here, or are there any problems, you are welcome to add.