Hello,
I’ve experienced with bizzare case.
First, I had installed avast SE to Windows Server System.
In last setup page, I chose “do not reboot”.
Then, open explerer and navigates to install folder(ex. D:\Program Files\Alwil\avast4)
There’s nothing. Only I can see folder name.
Log file: http://my.dreamwiz.com/websters/avsrv.log
Thanks in Advance.
Nothing in the folder at all? That sounds REALLY strange… :-
I’ll try to get someone have a look at it.
Thanks
Vlk
Do you have correctly set TEMP path? And is it on C: or D: drive?
In System control panel - Advanced - Environment variables, check the TEMP paths for both user and system. Try to change them to C:\TEMP and run setup again
What was there AFTER you rebooted?
Problem Solved.
Computer is infected by Hacker Def Root Kit. 
Anyway, Thanks alot~.