Unfindable untrusted file

I blocked two pending files. The files are unknown to me, cannot be found back on the computer yet they have been detected by Comodo Firewall and cannot be send to Comodo for a check (‘compression failed’).
Are these trojans or other malware and why Comodo detects them and I cannot find them ? Any action needed?
Files: C:\Recycler\S-1-5-21-1960408961-113007714-682003330-1003\Dc16.tmp and
…\Dc17.tmp

Thanks for any help.

Antonius.