hey dude
To reinstall internet explorer alone , you have to edit the registry . messing with the registry settings might corrupt your operating system . so be carefull . i have given the solution step by step .
1. Make sure that you have logged into administrator mode or an user account with admin privileges .
2
click start and click run . in the open box type
regedit and press enter . it will bring the regeistry window .
3. find the appropriate registry subkey given below ,and right-click the Installed (REG_DWORD) value, and then click Modify.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{89820200-ECBD-11cf-8B85-00AA005B4383}
4. change the value from 1 to 0 . and click ok .
5.close the Registry Editor, and then install Internet Explorer 6.