Have you seen the instructions in the links below:
Lots of Hidden sqmdataXX.sqm and sqmnooptXX.sqm Files in C:\ drive
sqmdata./sqmnoopt. file removal
Hope this helps.
a have sqmnoopt files on my hard drive. I can not seem to delete them they just keep copying themselves when I try to delete. I checked the search and i found that it is related to winndows live messenger. But couldnt seem to find out what to do. I am operation windows xp.