I'm having a problem with worksations in our school where, randomly, they will hang at 'welcome' or 'logging off'. We then have to manually power them off (bit awkward as they are concealed under benching) in order to recover them. Its a smallish network with approx 50 Win 7 workstations with a single win 2008 standard server. The school still uses Ranger (primary v8) and Symantec v12.1.4 - I did have similar problems with symantec v10 where it locked profile files, hung for ages and caused users to be logged on with a temp profile but at least they evetually looged on - with this issue, affected clients never timeout and stay stuck on the welcome or logging off screens until manually rebooted.
I had one of the technicians from the local authority test the DHCP and DNS settings and they confirmed these were ok. I've updated the nic drivers to the latest version, and tried rejoining clients to the domain but nothing has resolved this problem yet. I also support another school who have the exact same clients (Stone PC's) and they aren't getting this issue, althoiugh their server is 2008 R2. Has anyone else had a similar problem or have any suggestions?