All browsers crashing, under all circumstances

In early December, I started having CPU-usage problems, with Ad-Aware demanding 60% of the processing power and my system "hanging" with 99% usage. I uninstalled Ad-Aware, ran Spybot and McAfee virus scan, which found a Trojan in IE temp files. I cleaned, deleted all temp files. Around the same time - and I can't swear it was right after, but around the same time - firefox began hanging when communicating with certain text boxes, such as sending email through both gmail and google-apps gmail, posting on facebook, or logging into a secure server. IE does a similar thing after a few minutes. I tried installing Chrome, but it crashes as soon as it loads. The security settings in IE, which I rarely use, keep resetting themselves to allow active-x downloads, even though I keep trying to change those settings. This happens in firefox safe mode, with all extensions disabled, and even after uninstalling/reinstalling firefox and Flash (and even with Flash completely uninstalled). I'm wondering if I have a particularly sneaky trojan/malware, especially because of IE's security settings being re-set and uninstalling flash not helping - otherwise, I'd assume it was a software issue.

 

When I try to run msconfig, I get an error message that it's an illegal operation on a registry key marked for deletion, which doesn't sound right to me. I also get a warning notice when I start Vista (32-bit) that Windows has blocked some startup programs, which I also don't recall setting.

I'm having trouble attaching the MGlog file, so I'm going to post this and try again.

 

Here is the MGlogs file. Thank you so much for any help or suggestions that you can offer me!

 

Thank you for the suggestion. Here's the log: it found two suspicious items and deleted them. (I ran it twice, but could only find one log; hope this is the second one.) So far, some of the problems seem to be better. I was able to use gmail without FF hanging.

 

Thanks. Just curiously, what was the problem? I haven't tried to reinstall Daemon Tools, although I will at some point. (I have a netbook without an optical drive and I use the emulator to install purchased software on it.

I am still having problems - IE isn't working at all; it hangs ("Not Responding") as soon as it opens now, which is a little worse than it was before, when I could get into gmail before it would hang. The ActiveX security settings on IE are no longer changing themselves, however. Firefox is working, although a bit slowly, and I've had a few "Not Responding" incidents, more than before the problem started but MUCH less than before your help.

I apologize for not responding earlier - I unexpectedly received a litter of puppy mill rescue puppies to foster last Friday and someone starts to cry every time I sit down at my computer!