Operating system problem

Hey guys please help me when i start my laptop i am getting this four option after dell loading
1)Windows xp professional
2)windows xp professional(tune up utilities)
3)Default
4)Ubuntu

From that the first two option is okay i can handle but the 3rd & 4th option is coming everytime please help me to get rid of this two problem.I have been waiting for at least 2 years to get rid of this prob.I uninstalled ubuntu but the option is still displaying please help me...Thank you

I also used the command bootcfg /delete /id #
It is showing deleted but it is not deleted it is showing default next time when i open can u send me any software or any instruction on how to remove this extra option thx

one more thing i am also giving u a clue for my os prob
[Boot Loader]
Timeout=5
Default=C:\$WIN_NT$.~BT\BOOTSECT.DAT
[Operating Systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Windows XP Media Center Edition" /noexecute=optin /fastdetect /TUTag=HBUEPR /Kernel=TUKernel.exe
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Windows XP Media Center Edition (TuneUp Backup)" /noexecute=optin /fastdetect /TUTag=HBUEPR-BAK
C:\wubildr.mbr = "Ubuntu"


please make out from this information & give me a solution