ok.. i have looked more at this, and there are some 'reasons' that we have to look at:
Remove the Lmms folder in Program Files (C:\Program Files\LMMS.... )
manually (if necessary).
Do you use any unicode charachters in any of your paths on your pc
Unicode chars are not supported, only ascii-chars are, and unicode has given several other peeps problems -However , afaik - not crashes, but lost Settings and unable to load instruments.
Another thing i have to ask you -Is your xp an original-purches, or ..
Some has had problem with a missing dll
avrt.dll, otherwise located at the windows\system32-folder
Do you have that? ..Pira..d xps have strangely been missing this file |?
If you do not have it.. for what ever reason.., you should try a repair /recover
An orr. xp disk is needed for this.
You should also read
http://pcsupport.about.com/od/findbyerr ... -error.htm
About recovery of faulty xp installations.
Lets see if any of this helps, before last option is tried..