ThorChild: What AV did you use (it is likely a false-positive)? I scan with a number of things and none reported a problem? Are you on Windows 10 perhaps, if so it might be the OS forcing the delete of an un-signed (non MS certified) .exe file?
But to put people at ease over that last post, the 1.09.1 patch is not a virus. It just changes the game exe. After the patch the NMS.exe file is smaller than it was previously, but still runs the game fine (even with all my mods).
In my case it 'seems' to reduce frame rate a little (always difficult to be sure with NMS), and not sure if this was that patches doing or not, but for the first time i found an Emeril column which had a navigation point over it (like when you use your binocular vision on a building and get that 'dot' in the compass) that i did not place there (you can not 'scan' features like mineral stacks etc).
That was not all, that particular marked Emeril column kept regenerating itself after i had left it to sell my haul. I returned again and most of it was back (i had mined it to the flat surface level and just had the base in the ground to extract), about 2/3rds of it was again above ground, but not a visual bug, the mineral was there, so i mined it again, filled up my carrying capacity then went to sell that and came back to check (the waypoint marker dot thing was still there), and it had regenerated some of it back again.
I decided at that point that this must be a bug and because i was not sure what was in the patch, wondered if it had introduced this 'easter-egg' into the game. With the possible small drop in fps and no patch notes to see what had been changed (to see if anything matched what i was seeing) i decided to revert back to the previous 1.09 exe.
So maybe something odd is in that update, but it is not a virus (scanned with plenty of tools, totally safe).
I had this happen very early on.
Not a graphical glitch (I know the graphical glitch that some will accuse it about. -- There exists the known graphical glitch of when you move far away a resource tower appears to reset but you get closer and it looks mined again.
ThorChild is not describing that issue as I had the same issue as ThorChild. On another world (much earlier version) I had an Emeril tower that would reset. I mined it multiple times till I was well into the 10s of millions of units.
and following posts.