I have the exact same problem. When these errors occur the system hangs and has to be shut down and restarted. The event descriptions are as follows
1)TrueVector engine: Timeout on debug mute
2)TrueVector engine: File "C:\WINDOWS\Internet Logs\IAMDB.RDB" was corrupt and has been copied to "C:\WINDOWS\Internet Logs\xDB20.tmp". File "C:\WINDOWS\Internet Logs\IAMDB.RDB" was corrupt and has been deleted
3)TrueVector engine: File "C:\WINDOWS\Internet Logs\IAMDB.RDB" was corrupt, restoring from backup "C:\WINDOWS\Internet Logs\BACKUP.RDB"
4)TrueVector engine: File "C:\WINDOWS\Internet Logs\ACER-PLV5BVDZDL.ldb" was corrupt and has been copied to "C:\WINDOWS\Internet Logs\xDB21.tmp". File "C:\WINDOWS\Internet Logs\ACER-PLV5BVDZDL.ldb" was corrupt and has been deleted
5)The description for Event ID ( 0 ) in Source ( SaService ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: SaService error: 0, Fail to start engine, please check your configuration.
After this sequence has been completed, the computer hangs