Solved Drivers being deleted by something in Windows 7

I have not changed it yet but will in the morning. As soon as it happens again, I will post the results. Thanks!
 

My Computer My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Lenovo
OS
Win 7 home premium 32 bit
CPU
Intel(R) Core(TM)2 Duo CPU E6550 @ 2.33GHz
Graphics Card(s)
Intel(R) Q35 Express Chipset Family
Screen Resolution
1600x900
Hard Drives
Hitachi HDS721680PLA380 ATA Device
Internet Speed
20/2 meg
Antivirus
Sonicwall enforced client with Kaperski
Browser
Chrome
I got a similar problem

I'm using hp elitebook 8460p with windows 7 professional 64 bit and all of a sudden my drivers got deleted and I've installed most of them except the video one. I'm not able to get my 1366*768 resolution back, it shows default monitor ON and the highest possible resolution is 1200*800 one, pls tell me wt to do, I want hd resolution back:(
 

My Computer My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
hp elitebook 8460p
OS
windows 7 professional 64 bit
Did it happen with Languard disabled?
 

My Computer My Computer

Computer type
Laptop
Computer Manufacturer/Model Number
HP - Compaq 15
OS
Windows 10 Home x64
CPU
Intel Celeron N2840
Motherboard
Unknown, BIOS: F.31
Memory
8GB
Graphics Card(s)
Intel Integrated
Hard Drives
1TB GTP-partitioned HGST HTS541010A9E680
Partitions:
-650mb healthy unlabeled recovery partition (100% free)
-260mb healthy unlabeled efi system partition (100% free)
-"Windows (C:)" healthy boot page_file crash_dump primary NTFS (83% free, Win..
Antivirus
Avast
Browser
Firefox, Chrome
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