A complete system crash is going to be an issue with a piece of hardware or the drivers that control it. Msvcr100.dll is a system file. Make sure you have all of your OS updates installed, especially Visual C++ redistributables.
What version of Windows are you use?
windows xp pro, what are OS updates and where do i find out visual C++ redistributables?
Simply run Windwos Update.
done but still not fixed problem
Could you please post the output of the System Info in the Help menu (from first line to Settings Folder ... ditch the adapter stuff)?
And be sure to delete your serial number before posting.
Lightroom version: 3.6 
Operating system: Microsoft Windows XP Professional Service Pack 3 (Build 2600)
Version: 5.1 
Application architecture: x86
System architecture: x86
Physical processor count: 2
Processor speed: 3.1 GHz
Built-in memory: 3326.4 MB
Real memory available to Lightroom: 716.8 MB
Real memory used by Lightroom: 258.9 MB (36.1%)
Virtual memory used by Lightroom: 256.1 MB
Memory cache size: 61.6 MB
System DPI setting: 96 DPI
Displays: 1) 1920x1080
What video card are you working with?
I believe it's an Amd/ati hd5450 but I'm not 100%
did that last week
srill await your responce
I've only had LR crashing while rendering previews (similar to exporting) twice. Once was caused by a faulty power supply, and the other was caused by me overclocking the computer too much. But I use Win7x64. XP is now over 10yrs old (a lifetime in computer terms) and was much more prone to crashing than Win7. So my first suggestion is to update to Win7.
AppName: lightroom.exe AppVer: 188.8.131.52 ModName: msvcr100.dll
ModVer: 10.0.30319.415 Offset: 00010b90
AppName: lightroom.exe AppVer: 184.108.40.206 ModName: cameraraw.dll
ModVer: 220.127.116.11 Offset: 001fc314
i do NOT have any phones conected to my pc so that is NOT an issue why is this happening?
adobe why can,t you give me a definitive answer to this problem?
Because the crash appears to be occurring as a result of something wrong on your system. If you have all of your system updates installed, then likely the problem is that some of them have become corrupted or didn't install correctly. With the information available, my only suggestion currently is to uninstall and reinstall all of the Microsoft Visual C++ Redistributable packages.
Try running CCleaner to remove unnecessary temp files. (filehippo,com) Also check config file (msconfig) using filehippo. Remove unneccessary pointers in ms config loading in. See what these suggestions do.
Remove unnecessary files from your hard drive.
Also, remove swap file . it will rebuild itself on next boot.
Do one chancge at a time.
point the swap file to a empty drive if available.
Make sure the raw files that you are using are not damaged.
Just some suggestion.
Le me know if any works