For many PC users, SSD and the latest Win 10 operating system are used now. However, the capacity of SSD used by most users is 120GB or 240GB. After installing Win 10, it is easy to have the problem that the space of C disk is getting smaller and smaller. What if the disk space of Win 10 C is getting smaller and smaller? Today, Bian Xiao teaches you Win 10 slimming coup, mainly to delete some big files that are not very useful to effectively release the system C disk resources. 1, delete the file Windows.old If your computer is upgraded from Win 7 or Win 8 to Win 10, the space on drive C is getting smaller and smaller. It is recommended to delete the file Windows.old, which will free up a lot of space on drive C.. Windows.old file is the backup file of Win7/8 system automatically created when Win7/Win8 system upgrades Win 10, which is convenient for users to roll back to the old system in the future. If you don't plan to reduce the price to Win7/8 system after upgrading Win 10, you can delete this Windows.old file. The file size of Windows.old is generally above 5GB, and some even reach 10GB. Deleting this file will undoubtedly release the space of drive C to a great extent. To delete the windows.old file is very simple, just go to Disk Cleanup and delete it. The specific steps are as follows: 1. First, enter this computer in Win 10; 2. On system drive C, right-click and click Open? Attribute? ; 3. Under the general card selection of the disk, click? Disk cleaning? , continue to click? Clean up system files? ; 4. Have a final check? Previous Windows installation, and then click the bottom? Are you sure? You can start cleaning. 2. Deleting the hibernation function of Win 10 hibernation file is a power saving mode. During hibernation, the system saves the data in the memory in the hard disk, which makes the CPU stop working. When you use it again, you need to press the on/off key, and the machine will return to the state when you were asleep, without having to go through the complicated process of restarting Windows. In real life, most users rarely use this function, not to mention that the volume of hibernation file is almost the largest in Windows system, and deleting it can definitely get twice the result with half the effort. Win 10 how to delete hibernation files? How to compress and clear the hibernation file 1 First, use Win+R to open the run dialog box, then enter cmd and click the bottom. Are you sure? , open the command operation box, as shown in the figure below. Then in the CMD command box, type or copy and paste the following command: powercfg hibernate size XX Note: What is the last one of the above commands? XX？ Represents a percentage value ranging from 40 to 100. Recommendation 40 or 80. Users can enter a value less than 40, which will keep the hibernation file size at 40% of the system memory size. By compressing the hibernation file, the system space can also be effectively released, which can alleviate the embarrassment of insufficient C disk. The above is mainly based on the release of Win 10 C disk space, and other system garbage can be cleaned automatically with some security tools. The above is the Win 10 slimming coup brought by Bian Xiao, which is mainly used to delete useless files of large-scale systems. Of course, deleting Windows.old and compressing the hibernation file will cause the Win 10 system to be unable to be downgraded to Win7/Win8 (unless reinstalled), unable to use hibernation and unable to boot quickly. Friends in need should be cautious.