Today, I suddenly found the drive c space in a hurry. So I first cleared it with Master optimization and found that the effect was not obvious;
Use TC to open the hidden file settings and check the folders on drive C. I installed the cool music box. Its default music cache file is under drive C, which downloads hundreds of megabytes of music, so I deleted it. Later, the directory c:/Documents and Settings/all users/Application Data/Kaspersky Lab/avp6/report had a size of over MB, which was some report files of Kaspersky, it is useless, so you do not need to manually delete it. In Kaspersky, you can directly perform the following operations:
Reports and data files-> reports-> clear
These report files are generally useless. The default setting is to clear them once every 30 days. You can set them according to your preferences.
In this way, I have more space than 1 GB for drive C :)