Nero seems to have borked my system. No run or logout etc available.

[Fabula]

I had been happily using nero 6 for quite a long while, but for some reason it recently stopped being able to write audio cd's from mp3's.
So I thought I would try version 7 of nero, and downloaded a demo.
It started to install fine, and asked me to restart my computer. I did.
Then things went strange. One of those command prompt windows popped up and disappeared in an instant, so I assumed it was part of the install process. But after waiting a while, nothing continued. So I went into the temp dir and tried running the setup again from where it had unpacked to. It asked if I wanted to modify or remove the install. clicking on modify started things running, but it then it said install was interrupted. Same happened with remove the install.

So I thought I would try msconfig to see what had been changed on boot. No run box was available! winkey-R: "This operation has been cancelled due to restrictions on this computer"! ctrl-alt-del: No shut down or task manager! I am admin!

So I now have a system that won't let me shut down or view task list, "run" useful stuff, nero 7 not functioning, not removable, not installable, and nero 6 hanging when I try to run it.

Help!


Edit:
Worried it may be a virus, though I am running an up-to-date avast.

[vinnyT]

I'm assuming you have tried system restore, if you have it maybe worth trying it from within 'safe mode'.

Can you still use the pc generally?

If you can, try dloading autoruns - http://www.microsoft.com/technet/sys.../Autoruns.mspx - you run this from the .exe file so it doesn't have to be installed (I use it from my usb drive). This can tell you what is running at startup, may give you an idea if anything nasty is running, you can disable any from within the prog.

You will also be able to stop any nero progs from running at startup, which may help your current problem.

Hope this helps.