You mean Smartware, right? If my computer is not allowing me to uninstall an application, then what I would do is to download it again and reinstall it to fix the corrupted installation, then it try to remove the software again.
You can download Smartware again from this link: http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=5419&p_created=1271690740&p_sid=jB-D7Tdk&p_accessibility=0&p_redirect=&p_srch=1&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9MSwxJnBfcHJvZHM9JnBfY2F0cz0mcF9wdj0mcF9jdj0mcF9wYWdlPTEmcF9zZWFyY2hfdGV4dD01NDE5&p_li=&p_topview=1
If it doesn’t work, I’d call WD if I were you.
Hope it helps!
