I too am getting a message every time I restart that Avast needs a reboot -but this only happens when I turn on the internet connection!
I have just had Avast detect and remove a.exe - Trojan Horse, and Win32:Agent-AWB[Adw].
I have checked the othet post on this issue and I do not have a C:\Program Files\Alwil Software\Avast4\Setup\setup.log file to even look at.
I have also downloaded the latest version and uninstalled and re-installed.
And you still get it after the reinstall ?
If so it might be best to do a clean reinstall as it looks like there is probably a registry key remaining behind.
Download the avast! Uninstall Utility, find it here and save it to your HDD.
Now uninstall, reboot, run the uninstall utility, reboot install the latest version, reboot.
Try this first, check this registry entry (right after computer restart):
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager, if it contains “PendingFileRenameOpertaions”.
Check its contents and if there’s only “reboot.txt” from avast4\setup folder, delete PendingFileRenameOperations, don’t delete any other key.
Clean un-installed,rebooted and re-installed - still the same! As soon as I go online Avast detects c:\a.exe and I moved it to the chest.
No PendingFileRenameOperations in above location??? Nothing in Reboot.txt file.
I’ll come back to this tomorrow.
Check out this post (see below) about a.exe on the viruses and worms forum as there is some undetected malware on your system.
http://forum.avast.com/index.php?topic=32160.msg268762#msg268762
Please note before running the anti-spyware program we want to try and capture any files detected so we can send them to avast to improve detection. You could see the files that were detected by the anti-spyware program and see if you have a copy of them.
If so Create a folder called Suspect in the C:\ drive, e.g. C:\Suspect, copy and files found to this folder and let me know what was found. I will tell you what to do next.