In my opinion, all files could be deleted:
A0023369.dll was at system restore folder. If you disable System Restore and, after, enable it again, you would delete that file as this operation delete all restore points stored in your system.
delupdat.exe and
imscan.dll seem to be malwares.
Info.cpl was on a temporary folder...
pav.sig files belong to Panda antivirus (on-line probably). Panda does not encrypt their signatures
sui.exe and
wupdater.exe seem to be malwares as the two above and all related togheter

Maybe you tried to install some ad or spy program or visit its site
