Install location not accessible--in any way

[rokosz]

Hi, I load FZ maybe once a month. Last week it loaded, and small bumpout said there was a update. Ok, go ahead. Something went awry and the process failed. Now FZ won't load and reattempts at an upgrade fail.
The Details from the aborted install:
Execute: "C:\Program Files\FileZilla FTP Client\uninstall.exe" /frominstall /keepstartmenudir _?=C:\Program Files\FileZilla FTP Client
Cleaning leftover files
Output folder: C:\Program Files\FileZilla FTP Client
Can't write: C:\Program Files\FileZilla FTP Client\filezilla.exe

Turns out that existing the filezilla.exe can't be deleted. Can't run with admin rights either. Right click for properties: Security yields: You must have Read permissions to view the properties of this object. That lack of read permits shuts me, effectively, out of the advanced tab too. I attempted a delete of the program files\filezilla folder but that only removed the docs and resources folder, and left two undeleteable files files: filezilla.exe, fzsftp.exe

Ok, So try the download of the install again. Nope, turns out the (earlier downloaded file) FileZilla_3.48.1_win64_sponsored-setup.exe also can't be deleted/overwritten or manipulated in any way.

I got around all the above (except removing the unneeded original install folder and install module) by downloading via a different name and installing to a non-default folder.
I suppose someone at FZ may see this and learn something. What I'm also hoping for is: Anyone know how to get into the properties of that old folder (and install module) so I can delete them? thanks.

[botg]

Have you tried rebooting yet? Sometimes Windows refuses to let go of files until the system is rebooted.

[boco]

Sounds like messed up ACLs, or Defender's "Controlled folder access" is enabled.