RNAthChk.exe
(Real Networks)
Part of Real Networks RealOne Player. Look up RNDAL below for our views on RealOne Player.
Recommendation :
If you decide to keep RealOne Player, and are only interested in playing streaming video and music, and little else, then configure your firewall to also block RNATHCHK from being able to access the Internet, as its sole and only purpose seems to be to pick up Real Networks "update" notifications. An alternative that also works is to rename RNATHCHK.EXE to, say, RNATHCHK.EXE.OLD and that will ensure that it does not load (disabling it with Startup Manager does not work, it still loads unless you rename the program file).