When I open cmd.exe from the Start | Run menu the command prompt flashes open and then the whole desktop blinks, the command prompt closes and explorer seems to reload. As if you kill explorer.exe in task manager and start another instance.
The machine has only started doing this in the last week or so.
It's running XP Pro with SP2 with the latest patches.
It runs behind a firewall and under Trend Micro Worry Free Business.
I have spent 20 hours or so scanning with a variety of tools run from Safe mode, following advisories from the internet.
If I run cmd.exe from the system32 directory using Run As administrator it works, but running it as my user, which is administrator equiv I get the above behaviour.
I'm an IT guy, not a complete knucklehead, but I'm out of ideas on this one.
Any ideas? Thanks.