My laptop suddenly slowed down. What's going on?

Look, here's the deal:
I've got this 17-inch laptop running Windows 10, and occasionally I just unwind by playing Asphalt 8: Airborne.
The game was running smooth as silk until last night.
Last night, I fired up the game and out of nowhere, the resolution just reset itself from 1600x900 down to 1024x768.
I tried switching it back to 1600x900, but now it’s flagging 1024x768 as the "recommended" setting.

Now, every time I relaunch this game, the lag is so bad it's practically unplayable.

What do you guys think?

? What kind of laptop are we talking about here?
? Which OS are you running?
? What’s the GPU situation?
? How much RAM is currently in there?

wearymason4 said:— what laptop
? what OS
? what GPU
? how much RAM is currently installed

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System Information
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Time of this report: 11/24/2017, 20:52:56
Operating System: Windows 10 Pro 64-bit (10.0, Build 15063) (15063.rs2_release.170317-1834)
Language: English (Regional Setting: English)
System Manufacturer: Hewlett-Packard
System Model: HP ProBook 4720
BIOS: Default System BIOS
Processor: Intel(R) Core(TM) i5 CPU M 540 @ 2.53GHz (4 CPUs), ~2.5GHz
Memory: 4096MB RAM
Available OS Memory: 3952MB RAM
Page File: 4804MB used, 2091MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 12
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
Miracast: Not Available
Microsoft Graphics Hybrid : not Supported DxDiag version : 10.00.15063.0000 64
DxDiag Version: 10.00.15063.0000 64bit Unicode

Display Devices
---------------
Unicode Display Devices --------------- card name: Microsoft Basic Display driver
Manufacturer: (Standard display types)
Chip type: ATI ATOMBIOS
DAC type: (C) 1988-2005, ATI technologies
Device Type: Display-Only Device
Device Key: Enum\ROOT\BASICDISPLAY
Device Status: 4180000B [DN_ROOT_ENUMERATED|DN_DRIVER_LOADED|DN_STARTED|DN_ NT_ENUMERATOR|DN_NT_DRIVER|DN_NO_SHOW_IN_DM]
Device Problem Code: No Problem
Driver Problem Code: Unknown
Code : Unknown Display Memory
Dedicated Memory: 0 MB
Shared Memory: 1975 MB
Current Mode: 1600 x 900 (32 bit) (64Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: unknown
monitor ID: LGD027B
Native Mode: 1600 x 900(p) (60.080Hz)
Output Type: Other
Driver Name: Unknown
Driver File Version: file version : Unknown ( Unknown
Driver Version: 10.0.15063.0