Viewer 3.3.3 comes up fine, but vanishes suddenly within a couple of minutes

[SpinWeaver Radmussen]

I've been having this problem off and on for the last 3 weeks or so.  I bring up the viewer, and within a couple of mouse clicks, the program vanishes.  Gone. Nothing hangs up, no freezing, no logoff, just simply disappears in the blink of an eye.

When I try to relog, I get a message saying that the region is about to restart (which it's not).  If I log in anyway, the viewer opens.  It seems that if I can make it through the first 5 minutes of being inworld, I have no problem.

This is what's in my "about" tab:

Second Life 3.3.3 (260300) Jun 21 2012 14:14:25 (Second Life Release)
Release Notes

CPU: Intel(R) Core(TM)2 CPU T5300 @ 1.73GHz (1729.44 MHz)
Memory: 2047 MB
OS Version: Microsoft Windows 7 32-bit Service Pack 1 (Build 7601)
Graphics Card Vendor: ATI Technologies Inc.
Graphics Card: ATI Mobility Radeon X1400

Windows Graphics Driver Version: 8.36-070314a3-045540C-Dell
OpenGL Version: 2.0.6465 Release

libcurl Version: libcurl/7.21.1 OpenSSL/0.9.8q zlib/1.2.5 c-ares/1.7.1
J2C Decoder Version: KDU v6.4.1
Audio Driver Version: FMOD version 3.750000
Qt Webkit Version: 4.7.1 (version number hard-coded)
Voice Server Version: Not Connected
Built with MSVC version 1600

[Hitomi Tiponi]

Is this only happenning with Viewer 3.3.3 as I have heard of others that are  having this problem with more than one viewer?  There are other 'project viewers' and a Beta Viewer you can try if you do not wish to try a TPV.  That may indicate if it is Viewer 3.3.3 or something more general.

[SpinWeaver Radmussen]

Thank you for your response.  

Yesterday I experienced the same phenomenon on a second computer using Firestorm.  There seems to be no apparent pattern to the occurences, sometimes it will occur once or twice, then all is well.  Sometimes it will occur repeatedly (I think I've had the patience to see it 8 times in a row before giving up).

[Hitomi Tiponi]

Firstly make sure that your Windows updates are up-to-date and try Viewer 3.3.4.  I have a friend who had the same problem for two moonths and suddenly it seems fixed.