I know, I know. It had to happen after trying all those different security apps. LOL. I uninstalled ThreatFire Pro recently to use Webroot Desktop Firewall, and after uninstalling WDF to reinstall ThreatFire again, I got this message. Unable to execute file. Program Files/ThreatFire/TF Tray exe. "Create process failed do to code 14001 application configuration is incorrect. Reinstalling may fix the problem." I did try, but got the same message. I tried some other apps one at a time that I have used before to see if they would install and each one did, but still not TF. I am using Windows XP with Avast home at the moment and thought I would add TF, but obviously I can't until I find a solution. Just wondering why this may be happening and if CCleaner or Webroot Firewall may have deleted something from my PC that's needed to install TF. I posted about the problem in the PC Tools Forum and was told to install something that has to do with Side by Side 86 something or other, but that didn't work. I did a google search on the problem and what i found basically confused me, and although everything seems to be fine with my PC it worries me somewhat that some dlls. or something may be missing. I appreciate some help with this if possible, and thanks ahead of time.