C盘清理？
your c: drive can fill up faster than you expect, when windows reports low disk space, programs can slow down, updates can fail, and backups might not work, you do not need to be a computer expert to free up space, with a few simple checks and safe steps, you can identify large files, remove unnecessary items, and recover enough room for daily use, this guide walks you through clear actions you can take now, explains why each step matters, and gives quick tips to avoid repeating the same problem.
check what is using space,磨针工具软件可以帮你快速看到哪些文件占用了最多空间
open settings > system > storage or use file explorer to right-click c: and view properties, look for large folders like windows, users, program files, and program files (x86), use the built-in storage sense or a disk analyzer app to see folder sizes, identifying the biggest consumers helps you decide where to act first without guessing.
remove temporary files safely
windows stores temporary files that you can delete safely, go to settings > system > storage > temporary files, select temporary files, recycle bin, and thumbnails, then remove them, you can also run disk cleanup, type disk cleanup in the start menu, choose c:, and check items such as temporary files and system created windows error reporting files, these steps free space without harming your data.
uninstall unused programs
review installed applications in settings > apps, sort by size to find large programs you no longer use, uninstall them from the same menu, be careful not to remove programs you need for work, if you are unsure, search the program name online to confirm its purpose before uninstalling.
move personal files to another drive or cloud
photos, videos, and downloads often take the most space, move large personal files to an external drive, a secondary internal drive, or a cloud service like onedrive, google drive, or dropbox, after copying files, verify they open from the new location and then delete the originals on c:, this keeps your files safe and frees significant space.
manage system restore and page file
system restore points and the page file can use many gigabytes, to limit system restore size, open system properties > system protection > configure and reduce disk space usage or delete older restore points, for the page file, windows manages it automatically well for most users, only change its size if you understand virtual memory needs, reducing these settings can reclaim space but do so carefully.
clean up large and duplicate files
use file explorer search to find files over a certain size (for example, type size:>1gb), check downloads and videos folders for installers and copies you no longer need, you can also use a trusted duplicate file finder to remove exact copies, always review duplicates before deleting so you do not lose unique files.
prevent future buildup
set storage sense to run automatically in settings > system > storage, empty the recycle bin on a schedule and limit how many restore points windows keeps, move default save locations for documents, pictures, and videos to another drive when possible, regular small cleanups prevent the need for a large cleanup later.
总结
freeing space on c: is a matter of checking what is using space, removing temporary files, uninstalling unused programs, moving personal files, and carefully managing system settings, try the safe steps above, and set a simple routine to avoid repeat problems, would you like step-by-step help for any specific item on your pc? say which one and your windows version, and i will guide you.
常见问题（FAQ）
can i delete the windows folder to free space,
no, the windows folder contains system files required for the operating system, deleting it will break windows, use disk cleanup or uninstall unused programs instead.
is it safe to empty the recycle bin,
yes, if you are sure you do not need the deleted files, emptying the recycle bin permanently removes its contents from the drive and frees space.
will moving files to an external drive affect their use,
no, files will still open from the external drive, but they will not be available if the drive is disconnected, for frequent use, consider cloud storage or moving only archival files.
how much space should i keep free on c:,
aim to keep at least 10-15% of the drive free for system updates and smooth performance, for small drives, try to keep a few gigabytes free.