How to I kill (permanently) unwanted porocesses?

Recently upgraded to Mountain Lion on late'08 iMac. Deleted some unwanted apps (including Adobe Create studio, amongst others). Deleted the apps from the App folder without using uninstall..... Stmubled across recurring errors as below (this is a cut-n-paste from Console)

25/08/12 11:06:03.918 AM com.apple.launchd[1]: (com.apple.launchd.peruser.423[236]) getpwuid("423") failed

25/08/12 11:06:03.918 AM com.apple.launchd[1]: (com.apple.launchd.peruser.423[236]) Job failed to exec(3). Setting up event to tell us when to try again: 3: No such process

25/08/12 11:06:03.918 AM com.apple.launchd[1]: (com.apple.launchd.peruser.423[236]) Job failed to exec(3) for weird reason: 3

25/08/12 11:06:03.920 AM com.apple.launchd[1]: (com.apple.launchd.peruser.423) Job should be able to exec(3) now.

25/08/12 11:06:03.920 AM com.apple.launchd[1]: (com.apple.launchd.peruser.423) Throttling respawn: Will start in 10 seconds

25/08/12 11:06:03.922 AM com.apple.launchd[1]: (com.apple.UserEventAgent-System[11]) Could not find stream/token: com.apple.launchd.helper/5

25/08/12 11:06:03.922 AM UserEventAgent[11]: Could not set XPC event state to true for stream/token: com.apple.launchd.helper/5: 0x3: No such process

25/08/12 11:06:13.923 AM com.apple.launchd[1]: (com.apple.launchd.peruser.423[243]) getpwuid("423") failed

25/08/12 11:06:13.923 AM com.apple.launchd[1]: (com.apple.launchd.peruser.423[243]) Job failed to exec(3). Setting up event to tell us when to try again: 3: No such process

25/08/12 11:06:13.923 AM com.apple.launchd[1]: (com.apple.launchd.peruser.423[243]) Job failed to exec(3) for weird reason: 3

25/08/12 11:06:13.924 AM com.apple.launchd[1]: (com.apple.launchd.peruser.423) Job should be able to exec(3) now.

25/08/12 11:06:13.924 AM com.apple.launchd[1]: (com.apple.launchd.peruser.423) Throttling respawn: Will start in 10 seconds

There seems to be at least one process or thread trying to but failing to do something. How do I track down and kill the unwanted process/thread?