patflgn: You might be interested to know that the Symantec Tamper Protection is having similar issues with Windows Defender. In this case, it appears that Tamper Protection is detecting Winlogon or other file scanning done by Defender as 'attacks'. To learn more, go to the Microsoft NewsGroups for Spyware and search for Symantec, especially the Application Compatibility NewsGroup.
At this point, since the Symantec Tamper Protection really protects nothing except its own executables and serves merely to interfere or require the removal of other more useful anti-malware applications, it seems to have little value versus the cost. Though Symantec had a strong reputation for good protection in the past, it's also now loosing many to protection suites with leaner use of resources and less of the 'bloatware' effect noted in many forums.
Symantec still has one of the best management facilites in the industry, but other options have emerged, including some from Microsoft itself. This pressure appears to be causing Symantec to loose their point of reference and simply attack these other applications, both verbally and within their programs operation. This, of course, isn't helpful to their users and the community as a whole.
I try to reserve judgement when issues arise between vendor's products, but since I've used and/or helped with all of these products, I feel I can see what's real and what's simply the result of changes in the industry. Symantec doesn't seem to have an effective handle on what is currently needed for true protection and rather than fixing that problem, instead appears to be lashing out at other vendors through their own products.
You need to make these decisions for youself, but I'd recommend looking closely at what your real protection needs are and how well various vendor's products fulfill those needs.
Bitman