Avast tmp files will not delete

[ssu15211]

in my Avast C:\Program Files\AVAST Software\Avast - I have many, many tmp files but cannot delete as it says I do not have permission even though I am an admin.
below are some examples
Aav44c2.tmp
Aav4521c.tmp
AavA09E.tmp

There are hundreds - what are these??

[Pondus]

but cannot delete as it says I do not have permission   

Turn off avast self defence

[bob3160]

[igor]

Are you saying the files are directly in the Avast installation folder? If so, it's most likely a new version ready to be applied during the next reboot. (If you remove them in that case, I would guess Avast will stop working after reboot - and hopefully just Avast).
Or are you saying the tmp files stay there across reboots?

[DavidR]

@ Igor
Whilst I don't appear to have lots of tmp files I would query the Avast Housekeeping the Avast\Setup folder is chock-a-block with folders and files with names like SHA/MD5 numbers. For the most part these folders appear empty or have another sub-folder/s most of which are also empty.

So perhaps these tmp files of the OP could be remnants of housekeeping not being carried out.

[igor]

DavidR, what are the dates/timestamps of those folders?

[DavidR]

DavidR, what are the dates/timestamps of those folders?

They Go back for some considerable time (oldest 22/5/2017 23:24) and right up until today (16/2/2018 13:29).
Image extracts from top and bottom of the range.

[bob3160]

David,
I'm curious as to which OS this is showing up on. I have no TMP files in the folder mentioned
on Windows 10