When changing internet security programs, it is necessary to uninstall the current one. I recently changed from Trend Micro to Norton Security Suite, and I had to manually uninstall it from my Windows Vista operating system. I waited what seemed like forever for Norton to uninstall Trend Micro, and I finally canceled the attempt. I decided it would be much faster and easier to uninstall Trend Micro manually, and I was right. I used the following easy steps to uninstall it from my Windows Vista operating system, and within minutes I was able to install Norton Security Suite.
Step One to Uninstall Trend Micro
Begin by closing all open programs on your Windows Vista operating system.
Click on the Windows Vista flag in the left bottom corner, and go to Computer in the gray index area.
Click on Local Disk C, and click twice on the folder entitled Program Files.
Step Four to Uninstall Trend Micro
Locate the Trend Micro folder, right click on it, and select Open.
Look for the Internet Security folder, right click on it, and select Open once again.
Click twice on the TISTOOL file. In Windows Vista the icon looks like a red and white striped lifesaver that a lifeguard would use. You will now see an uninstall tab to the right of other Trend Micro tabs.
Step Seven to Uninstall Trend Micro
When trying to uninstall Trend Micro in Windows Vista, the last step is to click on the uninstall button and restart the computer. Simply follow the prompts, and Trend Micro will be successfully uninstalled.
Norton Security Suite
Be sure to immediately install another Internet security program such as Norton Security Suite. Norton Security Suite was free with Comcast high-speed cable Internet, and I am very happy with it thus far. It was very easy to install, and it is easy navigate and understand. Choosing this free option saved a considerable amount of money over subscribing once again to Trend Micro.
In addition, I can protect up to seven computers using my Comcast e-mail address without additional expense, and adding the second computer that also has a Windows Vista operating system was easier than the first. After I learned to uninstall Trend Micro from my laptop, I immediately did the same with my desktop, and I had Norton Security Suite up and running in just a matter of minutes.
Source: Personal Experience