Safe to delete files in C:\Windows\temp ?

Running a Win 7 Pro Laptop (HP) with a small SSD hard drive (180GB).
Pc is just playing music from Internet radio stations - selecting different stations during the day, controlled by Windows Scheduler.

The hard drive is now nearly out of space - only a couple of GB left.
Discovered that the folder C_\Windows\temp contains nearly 40GB of files - many of them with a .cab file type.
Question is then - is it safe to just delete these files or rather all the files in this folder?

-oberli
Olaf BerliOwnerAsked:
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aranaCommented:
I have never had any problem deleting the contents of the folder but it is better to run windows tool for that purpose, ("disk cleanup" i believe) you can find it  accesories
Programs→Accessories→System Tools→Disk Cleanup.
Hello ThereSystem AdministratorCommented:
You can run Disk Cleanup. It's safe to use. But this tool won't delete all junk stuff.
I prefer deleting all content of Temp folder manually.
You shouldn't be afraid of it.
JohnBusiness Consultant (Owner)Commented:
Some files in there are semi-permanent, but generally you can just delete them. You will be told if 2 or 3 cannot be deleted. Yes, safe to delete.

I do this because Disk Cleanup does not get all the files here.

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aranaCommented:
From the Temp dir yes disk cleanup not always deletes everything, but you are suffering from lack of storage space, and disk cleanup also removes some files from other folders of your disk, that are not easily accesible if you dont know the exact path. (also old update files, other temp locations etc)
Travis MartinezStorage EngineerCommented:
The only thing I would add to Disk Cleanup is to run it the second time to remove system files as well.  These would be old update files, etc.  I agree that removing the files directly from Temp is okay to run.

You might also look at the users AppData, Local, for the temp folder and see how big that has gotten.
Olaf BerliOwnerAuthor Commented:
Hard to select "Best" or "Assisted" solutions, so shared the points equally....
JohnBusiness Consultant (Owner)Commented:
Thanks you and happy to help.
Olaf BerliOwnerAuthor Commented:
Ran disk cleanup, but it didn't remove more than 0.5GB - even when running system cleanup.
Deleting manually all fiies from 2017 and earlier from c:\windows\temp freed up more than 15GB.
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