[Q] How to rollback to factory recovery mode? topic

So a few months ago I installed a custom recovery (CWM) for my phone to install some ROMS and stuff. But since then, I've had problems like all my apps stopping to work altogether after like, and hour or two of use or even 10 minutes of use. I've tried flashing other ROMs and factory ROM but the problem seems to have persisted every time. Anyway, so I think I'll probably need to make my own recovery.img somehow? I don't know, please help. The specs of my phone:

OS: Jelly Bean v4.1.
CPU: Cortex A9.
Chipset: MediaTek 6577.

I think those informations are enough to give guidance.

Thanks to anyone that helps. Have been really struggling with this issue.