Problem with Uninstalling

[lahratla]

I've a 2-years-old PC based on 667MHz Cyrix III with 256 MB SDRAM using WinXP. I used Spybot S&D and Sytem Mechanic 4 Professional. When I tried to uninstall some programs, a pop-up instruction of Spybot S&D's Resident Tea Timer appeared and after that uniwise.exe could not be found. I could not uninstall those programs.
How do I uninstall programs which do not have (missing?) unwise.exe or whose name did not appeared in Add/Remove Programs?

[theKonqueror]

Although not recommonded, u can try this: delete all files of the program u wish to uninstall, then clear its registry entries using regcleaner.