You can try running the Trend Micro Diagnostic Toolkit to remove Trend completely.
http://esupport.trendmicro.com/4/How-do-I-remove-Trend-Micro-Internet-Security-Pro-and-Trend-Micro-Inte.aspx
If that fails to do the trick,
please provide the SEP install log for us to help troubleshoot the issue.
Post the SEP_INST.log,
from start - run - %temp%\SEP_INST.log
Search for Return Value 3 and post the 10 lines above the return value 3.
Best,
Thomas