Most render crashes like you are describing, will be caused by a particular Video Effect you may have applied and/or compatibility problems with your graphics card.
More Video FX in Vegas are GPU accelerated now, which means you need an Nvidia or AMD Radeon GPU installed, for it to work properly.
Which exact version of Windows are you using ?
Version 17 only works in Windows 10. It is no longer compatible with Windows 8 and below.
Do you have a dedicated graphics card installed ?
Example: Nvidia or AMD Radeon ?
If you do have one of these GPUs, what model and Driver version ?
If you don't have a dedicated GPU, are you using Intel QSV (Quick Sync Video) ?
Go to Options/Preferences/Video - GPU Acceleration
If you have a GPU turned on, turn it off and re-boot Vegas, then try another render.
Re-installing Vegas rarely fixes anything.
It is better to do a full program reset instead of re-installing, because only a reset will clean the temporary files cache.
Reset instructions here:
www.moviestudiozen.com/doctor-zen-faq/573-how-to-reset-sony-software-to-default-settings#a1
Which Format and Template have you been using to render your video ?
Example: Magix AVC/AAC - Internet 1080p
Regards
Derek
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