Dell Inspiron 5458 - no reconoce memorias

Buenos Dias a todos, estoy teniendo problemas para agregar mas memoria a mi laptop. La misma tiene 4GB pero si quiero en el slot libre 4GB no la reconoce y comienza a sonar la alarma.

Windows 10 64bit

---------- [Syste Summary] ------------------------------------
Property Value
Computer
Manufacturer Dell Inc.
Family Not Available
Product Name Inspiron 5458
Model Inspiron 5458
Version 01
Serial Number FNVDG72
SMBIOS Asset Tag Not Available
SKU Number Inspiron 5458
Chassis Not Available
PC System Type Mobile
Machine Type AT/AT COMPATIBLE
Firmware Type UEFI
Infrared (IR) Supported No
UUID 44454C4C-4E001056-8044C6C0-4F473732
Disk Space
Disk C: 810.6 GB Available, 917.7 GB Total, 810.6 GB Free
Disk D: Not Available
Disk \: 548.6 MB Available, 890.9 MB Total, 548.6 MB Free
Disk \: 436.1 MB Available, 12.3 GB Total, 436.1 MB Free
Memory
Memory 4007 MB Total, 832 MB Free
Memory Load 79%
Virtual Memory 9021 MB Total, 3574 MB Free
Pagefile
PageFile Name C:\pagefile.sys
PageFile Size 5014 MB
In use 425 MB
Max used 708 MB
Registry Size
Current Size 134 MB
Maximum Size 0 MB
The system clock interval 15 ms