Windows 2000 Internet explorer browser error

I have a pc installed with win2000, not connected to any domain, but i am unable to open the add/remove program. With that whenever i try to access internet explorer there i am unable to open a link by right clicking on any link. Printing the page is not possible. if i download a pdf attachemnet it open in corropted format. Wht could be the possible reason. need your help and suggestion

Thanks
Natraj