What is temporary file?
Read this post to know it.
Typically, the program creating temporary files will delete them upon completion.

But sometimes, these temporary files will be preserved.
The temporary files will also be created when you surf the Internet.
Deleting these files, you are able to release the valuable hard disk space for other uses.
Temporary files of Internet will also record the sites we have visited.
This is not just a challenge for our personal privacy.
As a result, this will reduce the browsing speed.
Deleting Method
For some users, they may not know the location of this folder.
Here wed like to introduce a method.
In fact, the key of this method lies in how to quickly navigate to the temporary files.
Users should launch the Explorer or My Computer and then input %temp% in the address bar.
Then users can choose the files and press Delete to put these files in the Recycle Bin.
If users press Shift + Del, they can completely remove the files from the hard disk.
you’re free to read it to get some useful information.
In general, all files in this folder can be deleted safely.
Sometimes, some files cant be deleted because they are being used.
At this time, you could kickstart your system immediately and remove them.
In addition, the above method is applicable to many Windows systems like Win2000/98/NT and so on.
Alternately, users can use 360 security guards to clean up rubbish or trace.