Question laptop shut down. Have searched everywhere

Oct 4, 2019
Hello guys,
i have a toshiba laptop , with an amd hd radeon 7670m on. I have very recently performed format with a specialist who also cleaned my laptop internally and applied the creme. I am using a cooling pad and the temperatures as checked with "Core Temp" are running around 50 degrees yesterday i reinstalled my graphics drivers from amd website.
So what is my problem you ask ? Well my laptop shuts down without warning. But ! the way this is happening is strange. I open my laptop everything works fine, when i try to open league of legends client , it shuts down . so i open the laptop again , go to chrome everything works fine , but the moment i open a photo from google images it shuts down again. This happens with various strainous actions, like youtube video, opening images already downloaded , opening games etc. Why is this problem unsolved still? Its because after 5-10 shutdowns the laptop works perfectly fine. i can play skyrim , league of legends etc , watch various youtube videos , movies etc, even using after effects video editor with no problem , i can do all those for infinite time as long as i am still using my laptop , unless i close it. if i do i have to repeat the process of starting -shut down.
Laptop is running without battery,

Dunno if these help but here they are

System Information
Time of this report: 10/4/2019, 20:54:27
Machine name: BLACKCAT-PC
Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_ldr_escrow.190729-1700)
Language: Greek (Regional Setting: Greek)
System Manufacturer: TOSHIBA
System Model: SATELLITE L855
BIOS: InsydeH2O Version
Processor: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz (4 CPUs), ~2.5GHz
Memory: 6144MB RAM
Available OS Memory: 6106MB RAM
Page File: 2460MB used, 9751MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode

Display Devices
Card name: AMD Radeon HD 7600M Series
Manufacturer: Advanced Micro Devices, Inc.
Chip type: AMD Radeon Graphics Processor (0x6840)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_6840&SUBSYS_FB221179&REV_00
Display Memory: 3803 MB
Dedicated Memory: 1006 MB
Shared Memory: 2797 MB
Current Mode: 1366 x 768 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: unknown
Monitor Id: LGD033A
Native Mode: 1366 x 768(p) (60.019Hz)
Output Type: Internal
Driver Name: aticfx64.dll,aticfx64.dll,aticfx64.dll,aticfx32,aticfx32,aticfx32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll
Driver File Version: 8.17.0010.1404 (English)
Driver Version: 15.200.1062.1004
DDI Version: 11
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 8/4/2015 09:28:34, 1445224 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71EE2-2B00-11CF-B577-28DBBEC2C535}
Vendor ID: 0x1002
Device ID: 0x6840
SubSys ID: 0xFB221179
Revision ID: 0x0000
Driver Strong Name: oem30.inf:ATI.Mfg.NTamd64.6.1:ati2mtag_R476:15.200.1062.1004:pci\ven_1002&dev_6840
Rank Of Driver: 00E62001

plz help i cant for the love of god understand what is happening and Why !
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