It is not a good idea to simply ignore errors. Those installation errors could be causing this problem.
However, you can <a href=”http://download.oracle.com/docs/html/A95493_02/install.htm#i1008302″>Review the Installation Session Log</a> and try to find more information about those errors.
Also, make sure your computer meets the <a href=”http://download.oracle.com/docs/html/A95493_02/reqs.htm#i1101759″>System Requirements</a>.
You could also <a href=”http://download.oracle.com/docs/html/A95493_02/install.htm#i1008321″>Deinstall Oracle Components and Services</a> and try the installation again (paying more attention to any error or message shown during the process).