...disappearing after 3-4 seconds upon the execution. UAC turned off. Driver 195.39, 9800GT. Statistic server works (sits in the taskbar and the on-screen frame rate counter works in all games perfectly). I installed the recomended plugin during installation of the RivaT.
Thank you for directing me to that thread. However, "my case" is slightly different - after I start RivaT, it appears on the desktop, stays there for about 5 seconds and disappears without any message. No crashes, no problems other than that. But I guess, Unwinder will resolve all this with the next build of RT. Thumbs up for Mr. A Nikolaychuk!!!