Epademic,
Since you're using Abyss, please be sure that you're using the latest version of it and that you run the vbs script to update it while HS and Mabi aren't running. Making sure you've done this will ensure more fault tolerance to active and running programs. If not then...
You have something running that is affecting windows, that probably was recently installed about the time you started having issues. Perhaps there was an update to one of your programs that's making it run differently?
When you do a search on this error you'll be surprised at what you find. I've had this error before too, but only due to something thats affecting the active windows processes. Meaning, you'll need to dig into msconfig, and taskmgr (depending on your windows version. I leave it to you to start digging and educating yourself on this. This problem will happen again with something else that uses Ahnlabs Hackshield, as it's very common. You'll want to educate yourself a bit...