4Diskclean Freeware Delete all Temporary Files *.TMP and *.~* . While working, many computer programs and also Windows itself create a lot of temporary files. These files are not harmful in themselves, but they tend to accumulate and take up a lot of disk space. Also Windows will work slower than usual. Delete all temporary files spread on disks with some cliks! Delete TMP files. Erase temporary folders content. 8 idioms - multi language.