Hello Ondrei,
FYI:
1. This might have been resolved sooner. The following information was insufficient:
"by Dusan_AVG - 6/7/11 9:22 AM
Installation again fails on accessing:C:\ProgramData\Microsoft\Windows\Start Menu\Programs\AVG 2011
... check access permissions of folder and its subfolders:C:\ProgramData\Microsoft\Windows\Start Menu\Programs\
Permissions need to be Full control for Administrators and SYSTEM."
... the problem apparently was at the "Start Menu" folder. I re-uploaded the screenshots showing full permissions for SYSTEM and Administrators for the Programs folder, as of 6/9/2011, 8:41 AM.
2. So here's what I did, responding to your instructions:
a. Looked at permissions for the Start Menu folder (screen shot uploaded for your curiosity).
b. 3 identities had full permissions for that folder, none were SYSTEM or Admins
c. In particular, one identity (ending in 100
could not be found in the registry. I deleted that.
d. The other "unknown" (ending in 1000) was from the other OS of my dual boot, np; not removed.
e. This was so messed up that I replicated the permissions from my other OS for the entire \ProgramData\Microsoft\Windows folder and all subfolders.
f. Used the avg_remover tool to get rid of my last failed installation
g. Ran the 2011_1382a3666 installer, this time with success.
Many thanks to you and everyone else that hung in there with me on this,
Dan