If you have 32bit Windows, then the most common cause is memory issues. See here for help:
https://forum.multitheftauto.com/topic/78081-32-bit-windows-crashing/
Well, you sent the wrong file. I wanted tags.dll
But anyway, your system is infected. I don't know why your antivirus didn't work.
Solution is to download and install this and do a full scan: https://www.malwarebytes.com/
1) Go to: https://www.virustotal.com/
2) Press 'Choose File'
3) Select C:\Program Files\MTA San Andreas 1.5\MTA\tags.dll
4) Press 'Scan it!'
5) Post result link here