If it was the AV then why would it only happen when TCC.EXE is running. This only occurs when the TCC.EXE process is running, Another thing is this is a new XP computer, I have been reinstalling everything. I did run TC 12.01 until I could clear up some firewall activation issues. Unlike my other computers, this computer also access lots of network drives and use we use active directory.
I am unable to reproduce this issue on my system. I opened up two full TCMD sessions, one with TCmd v12.11 and one with TCmd v14.00.23 preview release (one TCC tab open on each). I open Microsoft Word 2010 (version 14 per MS counting), and start a new file, and I experience no character loss or sluggishness while typing . . . and I can type fairly fast. I closed TCmd and tried the same test with two TCC sessions (wide with 140 chars, 40 lines), and tried editing a Windows document again. No typing sluggishness, dropped characters, or system latency that I could detect.
Windows 7 Pro SP1, 4 GB RAM, 3.0 gHz Intel dual core CPU, rating 4.5 on the "Windows Experience Index" (visible in Win7 under "Control Panel > System"; not available for WinXP). Of course we use active directory here . . . I am using TCC on my office PC.
Craig, try your test at different times of day and see if you get the same problem. Also, maybe it's related to the overall performance of the WinXP machine you are using, or network issues. Try eliminating things that might consume system resources and see what different results you have. Try the same test on your home PC or laptop and see if you get the same results. Just some thoughts. HTH.