If you want to clean cclean, if you are a vista system, use the following methods to clean it:

1. Use the cleaning tool cclean that comes with the system. Right-click the properties of disk C, open the disk to be cleaned, click the files of all users of this machine, check everything in the cleaning option, and click Delete.

2. You can also cancel the system restore point. The default is disk C. Right-click my computer properties, select System Protection under the task on the left, and check System Restore to save the disk.

Space.

You can download a vista optimizer and use the cleaning tools to streamline the system.

This should give you 4 or 5 gigabytes of space. If you don't know much about other system files, you'd better not tamper with them, especially delete them.

If you are an xp system, click Start-Programs-Accessories-System Tools-Disk Cleaning, and select Disk C for cleaning. You can also choose to defragment. You can also download an optimizer (not a vista optimizer) to clean it up. The operation method is simple.