Posting this in case anyone has experienced similar issues. Plus it feels good to contribute a little something to the group, as I mostly ask questions.
I am using AmiBroker 5.20 with a clean Win XP install. The only other programs on the machine are MS Office and McAfee Security Center. During a several-hour optimization last week, AmiBroker popped up a memory error of some sort. I tried to click on the "bug report" button, but everything was frozen. After force quitting and resetting the PC, I returned to AB, but it seems it got irreparably damaged. Any time I tried to send a formula to the AA window, AB would take 2-3 minutes to complete the task. Previously this only took 1- 4 seconds. Windows task manager indicated that AB memory usage was ballooning past 1.5 GB, whereas it used to max out at 115 MB. I uninstalled AB using control panel, and deleted all AB folders and files. I even emptied the recycle bin. I did a fresh install of AB and thought that would solve the problem. But the problem persisted. Other programs like MS Excel worked as fast as they normally do. Only AB had this weird slowdown effect. I installed Glary Utilities and repaired and defragged the Windows registry. I optimized memory, got rid of any temp files. Ran chkdsk, and disk defrag. I uninstalled AB again and repeated the Utilities repairs/optimization once again, just in case. Finally did a second fresh install of AB - yet the problem persisted! The only thing that ultimately worked was doing a *Windows System Restore* to 30 days ago. AB finally worked normally like it used to. I guess the veterans on this board might have done the restore instead of all the crap I tried. But, I am almost ashamed to say, I never even knew Windows had a system restore function. Or maybe I knew at one time, but forgot it was even there. In any case, that's the way to solve any mysterious AB slowdowns.
