Games crash after windows reinstall and hard drive change [help]

oliver96

Reputable
Jul 13, 2014
19
0
4,510
I reinstalled my windows a few days because i bought a new hard drive and cleaned my PC of any dust during the replacement, all my games worked fine before i reinstalled windows, my games ran really good. after reinstalling windows now all my games crash after like 20 minutes of gameplay, it freezes and i cant get out of it and have to turn off the computer manually ,the games im playing so far is just dota 2 and unturned and they're crashing these are really small games. I always played skyrim in high quality but i don't want to install it until i can fix this. what could the problem be? need help!

here are my specs :

Windows 7 Ultimate 32-bit SP1
CPU
AMD Phenom II X4 965 54 °C
Deneb 45nm Technology
RAM
8.00GB Dual-Channel DDR3 @ 666MHz (9-9-9-24)
Motherboard
BIOSTAR Group A960D+ (CPU 1) 52 °C
Graphics
FPD TV (1360x768@60Hz)
1024MB ATI AMD Radeon HD 7700 Series (Sapphire/PCPartner) 40 °C
Storage
931GB Western Digital WDC WD10EZEX-00BN5A0 ATA Device (SATA) 34 °C
Optical Drives
ASUS DRW-24B1ST c ATA Device
COMBI RW16x10/DVD ATA Device
Audio
Realtek High Definition Audio