I was tried to edit a basic program at one point,  but it just disappeared and Doors spewed out a 'file not found' error and strange artifacts appeared on the screen. I
attempted to run the program,  but same error. This happened before a few times,  despite numerous OS reinstalls. Also,  when I was playing with another basic program,  most of my RAM momentarily disappeared until I reset it. Sometimes when I open the memory management menu,  for a split second I can see 4-pixel squares and a few arrows on the top 1/4th of the display. I am pretty sure I did not mess up the OS. Please help.

P. S. My calc is running at 16.59mhz. Is this normal?

Doors CS 7.2. I am sure I am not using any bad software. Sometimes,  the calc even crashes for no reason. I garbage collect every time I finish editing or deleting an archived program. Any chance this might be an HW fault of some kind?

Sadly, these things happen at the random. Don't know what to say. These issues are very annoying and absolutely unpredictable.

Is there a way to fix such issues without downgrading (patches and the like), or am I looking at something more sinister? I have had these and/or similar issues since 2015. I've been using 2.55 for years now.

Well,  I did not overclock my calc. It seems to be doing this on its own. The speed has increased slightly ober the past 2 years. Maybe some components wore down because  of the increased use ever since I discovered ticalc.org? 
I really don't have much to say. The last crash erased the settings set by LCD fix, even though I did not pull the batteries (just resetting RAM normally doesn't erase that config). Also, of it means anything,  my calc was purchased in December 2009 and has P-0908M at the end of the serial number.

[...]
As for other settings being lost, could you check to make sure the backup battery still has power? It might not which would be why you could lose settings on a battery pull.
[...]

From the name i guess LCD fix would send commands to the lcd driver which isn't powered by the backup battery

That thing on Cemetech is total crap.I was to scared then to admit I was unsure or wrong. I admit I was wrong, but at the time didn't know what made the calc seem a little faster. My theory is that I probably screwed up some config setting or port value and messed the refresh rate up. Please do not remind me of the one mistake I made on Cemetech that doomed me and made a large number of members ridicule me and provoke me to emotionally react to everything. That thread is the main cause of all my trouble. I wish i could just fix that up and return to Cemetech and show them how good and smart I really am. As for the increased speed, my father (who has a PhD in electrical engineering) told me that crystal oscillators suffer from a little "age wear'' (perfectly understandable, since TI was probably planning to make users buy a new calc after some time, so they stuffed low quality components) and that 16.59mhz is within tolerance range (resistors are not precise). I am locking this topic because I haven't gotten any help and please DO NOT EVER MENTION ANYTHING I DID ON CEMETECH. I really want to have a decent reputation here and don't make me look bad.