[SL will crash,and shut down my computer,i heard it happens to others too,when will it be fixed?]

tune down your overclock.  I had the same issue, did everything that everybody on this site said to do and it didn't fix the issue.  out of curiosity I manually tunned down my OC and it fixed the issue.

[Computer shutting down when play for 2 min]

well here is another option.   I had the same issue, turns out I was overclocking too much.  Once I turned it down I had no issues

Mind you this is after a weekend of pulling my hair out of my skull, I cleaned, tested, updated everything and got no results...tuned down my OC and it runs just fine.

[Second life keeps shutting down my computer after about 5 minutes or so. How can I fix this?]

ok well after testing and what I figured out that by tunning my OC down secondlife no longer crashes.  is that your issue?  I don't know, but if your comp is overclocked, tune it down and see if that helps.

 

[Second life keeps shutting down my computer after about 5 minutes or so. How can I fix this?]

Ok well I've had the same issue.  My whole computer would shut down after being in game for roughtly 20 min.  It also happened when playing Guild Wars 2.  So don't fret it's not a SL thing nor is it any of the viewers. 

I did extensive testing, and I can assure you it's not heat.  My comp runs between 47 and 52C. 

I then thought maybe it was dirty.  cleaned the whole thing out top to bottom inside and out.  Still didn't fix it.

Ran bios, registry cleaner, defraged, disk clean, and updated every single driver.....still no luck.

 

The answer........the power supply.  I'm running a 750w PSU and it's being drained from the increased graphics demand due to improvements in graphics.  It could be my graphics card, however the specs on the card require only 600W and it runs any other game with no issues, even GW2 now that they fixed some issues.  I also have no problems watching movies or doing every day tasks. 

Get a new power supply, I recommend anything above 800W.  I'm getting a 1020W next paycheck.  It is a cheaper option then upgrading your graphics card and I'll be happy to repost how it worked out around the 25th of this month.