Simple (temporary) solution (until it reoccurs): delete the string values with numbers and the value 'MachineThrottling' in HKEY_LOCAL_MACHINE\Software\Microsoft\SQMClient\Windows\DisabledSessionsSven Groot said:I'm now also experiencing this issue, on two machines, and in both cases the last thing I installed successfully was Adobe Reader 9. Could that be it?Sabot said:*snip*