Hello,
Well its my first guide & I'll try to explain as much as I can.
IDK why this happenes but AFAIK it happens when a driver is outdated on windows.(as said a MS Support team)
This is the most retarded error that I came across for years and I noticed lot of people found this error
There are 3 main Ways to fix this.(as i know)
1) Formatting your PC
2) Creating a New User Account & Running GTA SA from it( This is the quickest way)
3) You can completely remove (Not repair) -uninstall MS Visual C++ & .Net FX and install the newest available version.
Hope You find this helpfull!
These are the ways I knwo to fix this error.Feel free to add more if you know.