We use Avast for Business in our organization of 200+ computers and use Windows roaming profiles. Since the program version update over the weekend (2017-03-04) we have had several problems. Most seem to have updated correctly on their own, but the problems should be reported.
Computers that are updated but not restarted. Several users got temp profiles upon login. Restarting the computer fixed some of these.
Computers that are restarted after Avast program update. Some users got temporary profiles. The NTUSER.DAT, NTUSER.INI, NTUSER.POL did not get synchronized to the server. Replaced these files from server copy of roaming profile into local computer copy of profile and user could login and receive profile with all of their files. Still had the following issue...
Most users (roaming profiles) had a problem with receiving temporary profiles. Apparently users' AppData\Avast Software folder is now locked by Avast program. When users login, server copy of roaming profile fails synchronization because of this (see Windows Application log files), and user is presented with a temporary profile. Resolved this by creating a GPO to exclude AppData\Avast Software from roaming profiles. Also had to delete AppData\Avast Software folder in each user's server copy of roaming profile. The GPO blocks copying the folder to the server, but if the AppData\Avast Software folder still exists in server copy of profile then it will attempt to write it to local computer profile upon user login, but AppData\Avast Software folder on local computer is now protected by Avast program. Because local AppData\Avast Software folder cannot be overwritten, roaming profile synchronization will fail unless the folder does not exist in the server copy.
I also noticed that deleting the local profile completely is now impossible. AppData\Avast Software is locked by Avast as well as formerly mentioned files (NTUSER...), so profile now cannot be completely deleted and new profiles receive names with extra characters appended. I checked Windows ACL's and I am a member of local Admin group with ownership, but attempting to reset ACL's again returns error that I am only allowed to view ownership and I am not allowed to change it. Doesn't matter to most people, but we have lab computers that delete the profiles upon logout, and GPO's to restart computers. End result is numerous mostly-deleted profiles.
Hope this helps some, hope Avast can add these to bugfixes.
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Bram14, if you want to resolve your problem, check your Windows Application event logs. Recommend having Avast installed, logging in with problem account, then checking Windows Application event logs, you should be able to see what is failing and why you are receiving a temporary profile.