Tried that solution; worked for a few days and then the issue came back. For a complete uninstall I did the following, which also includes part of your solution:
Remove the TMTitanium with diagnostic toolkit:
A. Delete TrendMicro in the Registry (run->regedit)
1. Click Start and click Run (Start Search if using Vista or W7) 2. Type regedit and click OK or hit the Enter button 3. Look for HKEY_LOCAL_MACHINE on the left pane of the Registry Editor and expand it. 4. Under it expand Software 5. Under Software look for TrendMicro folder and delete it 6. Close Registry Editor B. Delete Trend Micro under C:\Documents and Settings\All Users\Application Data (C:\Programdata if using Vista or W7) 1. Click Start and click Run (Start Search if using Vista or W7) 2. Type C:\Documents and Settings\All Users\Application Data (C:\Programdata if using Vista or W7) and hit Enter 3. Look for the Trend Micro folder and Delete it C. Delete Trend Micro folder under Program Files 1. Click Start and click Run (Start Search if using Vista or W7) 2. Type C:\Program Files and hit Enter 3. Look for the Trend Micro folder and Delete itD. go to "C:\WINDOWS\Temp" and delete everything what's inside E. Run SupportTool.exe again to completely remove Titanium and then RESTART computer (follow removal steps listed below)1. Download and run a copy of our Diagnostic Toolkit (tistool.exe) to uninstall all traces of TrendMicro products from your system. The link below will have the information needed to get you started:http://esupport.trendmicro.com/Pages/How-do-I-remove-old-or-new-versions-of-Trend-Micro-products-in-... 2. Once the computer restarts after the first uninstall attempt please run tistool.exe again. When you click on UNINSTALL SOFTWARE from STEP 3 (see screenshot from above website) you show now get a small window with the option to CONTINUE or CANCEL. 3. Please click on CANCEL. This will now show a windows with a drop down menu asking you to chose what TrendMicro product you would like to uninstall. 4. Start with the TrendMicro Internet Security 2010 PRO. After the uninstall process do not restart your computer. 5. Do steps 2-4 for all version of the TrendMicro Internet Security PRO until 2007 6. Once this is finished do steps 2-4 for the TrendMicro Antivirus PLUS Antispyware (2010 to 2007) 7. After completely removing all traces of TrendMicro from 2010 to 2007 restart computer and try check if you can now install the software. D. Restart computer and then Reinstall Titanium. After the installation is complete, update it manually it would probably restart the product for the first time because is updating some engines after the update is complete wait for 5-10 min and then reboot the pc and check for updates again manually and see what happens ... that worked for me .... hope this helps ... E. then you can configure your settings ..... After doing this, it worked fine for a few days, but the issue started up again. What finally seemed to work was changing the System Startup setting from Balanced to Extra Security. The problem only occurs about once a month since I made that change which is alot better than every startup.
