What a s***ty night and day I've just had.
Forced into a format and reinstall last night by reasons unknown.
Out of the blue, I suddenly couldn't run any programmes at all except Internet Explorer, just kept getting the message "do you want to run or save this file?", which just kept popping back up when I pressed yes..
When booting, got the same request for every one of the items in my startup sequence, so I had no AV running etc.. Couldn't even access Windows Firewall to see if it was running, or System Restore.
Had a quick visit here, but didn't stay long without AV and firewall, and more worrying, my recguard (system recovery partition protection) wasn't running.
The name that kept popping up with most of these blocking messages was "rundll32".
Had a look at that dll last night, and it was the only one in system32 not to have the two cogs on its icon, just plain, and after reinstalling today, it's still the same. Is that trying to tell me something?
Anyway, the biggest headache was Microsoft Update. That flaming programme kept giving me error messages, but eventually got it working. Only 74 updates to install.
It was probably something simple, but seemed too risky to come asking advice with no security software running at all, so opted for a reinstall. Probably needed a spring clean anyway.
If anyone has any ideas as to what caused this, I would be interested to hear them, and in the meantime I'll do a Hijackthis log, which I'll post.
Would appreciate someone looking at it just to make sure.
The joys of lalaland. You just have to laugh.