Symantec causes a lot of problems, including performance problems on computers, and can be tough to remove. I've seen this in the past with Norton Products, including the former Norton System Works, Norton Internet Security and so on, on my own system.
A lot of people across the net, have also reported various performance problems and other problems with the product.
I hope Trend Micro's Program wasn't one of those recommended, Trend Micro's AntiVirus program failed the most recent round of VB100 tests that happend I think it was back in April or was it earlier this month.
I've long since quit using Symantec Products.
I use Live OneCare 2.5, as it doesn't cause a performance hit, nor does it cause me any problems.
Before Service Pack 1 came out for Windows Vista, Microsoft wasn't going to allow anyone to have access to the kernel and other key areas of the OS. Then along come Symantec and McAfee and started whining they can do a better job than Microsoft, which is a load of bullcookies. They whined that if they didn't have access to the kernel and other key areas of the OS, they would file antitrust charges, of which they had no right to do, as Microsoft was simply increasing the security of Vista, and those two companies would have to spend money to rewrite their programs.
To make a long story short, come Service Pack 1, Microsoft gave in, and allowed those two companies access to the kernel and other key parts of the OS, which never should have been allowed. In effect if one is running a Norton AntiVirus, Internet Security, Norton 360 product, or McAfee product, you are basically wide open should a new piece of malware, that can get around those programs.
If you want to stop most of the garbage from getting on to your system, even when running those programs, go in to the bios of your motherboard, and enable the NX bit if running AMD, or XD technology if running a Core 2 Duo or Quad Core cpu, then enable DEP for the OS, if DEP for the OS is not enabled by default, then right click on the IE icon, if running IE7 and select run as administrator on either the icon on your quick launch tool bar, and go through the UAC prompt, and select the option that you want to run it as an administrator.
Then click on Tools and select Internet Options and then select the advanced tab, and then scroll down to the Security section and place a check mark in the box next to Enable memory protection to mitigate online attacks, and then click apply and close your IE7 options. Then you can use IE7 with maximum protection.
