Windows 10: I'm trying to delete files I highlight files to be dleted, press delete button nothing...

I'm trying to delete files I highlight them and press delete button but nothing happens. help.

:)

 

Cannot delete files in Temp

There are a few files that i cant delete in
C:\Documents and Settings\1st User\Local Settings\Temp
which are ~DF567B.tmp, ~DFB71E.tmp, ~ROMFN_000007A8 and Perflib_Perfdata_7a8.dat. And some times there are a few more.
What are these files and why cant they be deleted?

 

Cannot delete files in Temp

im quite sure none of them are spyware perflib perfdata is just a temp file created by windows (or maybe a program you have installed) ive had the same thing and after a while of googling found them to be harmless i think they will dissapear on there own or you can delete them when there no longer needed by the system, try a washer program and see if that gets rid of them, i used to use a trial version of window washer but havent used this in a while so dont know weather they still do a trial or wether it comes with any kind of spyware as its a trial. but a washing program usually cleans everything if its a good one.

also try booting into safemode as administrator and deleting the files.

 

Can I delete this unknown file safely?

I'm currently tidying up my external Western Digital HD and I ran Treesize to see where everything is.
I came upon the highlighted file and sub files, below, which is hidden, but I wish to get rid of it as it contains 20Gb of data.
It contains files, such as films, which I had previously deleted and which I thought had gone but which appear to have gone to some hidden deleted file.
I presume it would be safe to delete this whole file and sub file via the Treesize application without it affecting all the stuff I want kept on the HD?

Tom.