Hi Oshan,
I appreciate your concern.
It appears to be an issue with drivers/Operating system installed. However, we can give try some more steps. You can open 'Device manager' of computer and change the following options as listed:
- Open 'Device Manager'
- Expand 'Network Adapters', right click the wireless card and choose 'Properties'
- Change '802.11h+d' to 'Strict 11h'
- Change 'Afterburner' to 'Enabled'
- Change 'Antenna Diversity' to 'Main'
- Change 'AP Compatibility Mode' to 'Broader Compatibility'
- Change 'BSS Mode' to '802.11g Mode'
- Change 'BT-AMP' to 'Enabled'
- Change 'Fragmentation Threshold' to '2300'
- Change 'Locally Administered MAC Address' to '1234567890AB'(This step is important)
- Change 'Minimum Power Consumption' to 'Disabled'
- Change 'PLCP Header' to 'Long'
- Change 'Roam Tendency' to 'Aggressive'
- Change 'Roaming Decision' to 'Optimize Distance'
- Change 'RTS Threshold' to '2300'
- Click the 'Power Management' tab
- Uncheck 'Allow the computer to turn off this device to save power'
- Open 'Power Options'
- Click 'Change plan settings' for the selected power profile
- Click 'Change advanced power settings'
- Under 'Wireless Adapter Settings' , click 'Power Saving Mode' and change the settings to 'Maximum Performance'.
Save changes, once the settings are changed as mentioned above.
Restart your computer and see if it helps.