I have Admin privilege and am running LTSpiceXVII.exe as administrator on a PC with over 50 GB disk free space.
Started with fresh download of LTSpice -- today 4/5/2021.
Installer runs for a minute then throws popup
"Trouble writing: C:\Program Files\LTC\LTspiceXVII\LTspiceHelp.chm
Trouble uncompressing file: "C:\Program Files\LTC\LTspiceXVII\LTspiceHelp.chm"
Disk full? Permission problem?
This might be curable with fresh reboot."
Clicking "ok" abandons the install
I tried rebooting, and installation still fails. I tried LTSpiceXVII downloaded about a year ago, with the same failure.
Fixed spelling typo
[edited by: FBelsak_at_AMAT at 2:20 PM (GMT -4) on 5 Apr 2021]