"Can't connect to this network" troubleshooting

After much research and testing of other answers found on SuperUser and online I cannot resolve:

• All the devices that I'm connecting to my router are connecting/working normally, except one PC.
• These devices include 3 android phones, 1 MacBook, 1 PC Laptop and two Android tablets. All working without any problems whatsoever.
• The PC that won't connect won't even touch the router and it really pisses me off that I can't solve it.
• I've tried with the winsock reset, driver updates, tried with a wifi dongle, no dice.

Log Output

[Microsoft-Windows-WLAN-AutoConfig]Connection started 2  
[Microsoft-Windows-WLAN-AutoConfig]Begin Connect API   
[Microsoft-Windows-WLAN-AutoConfig]FSM Current state Disconnected, event Cmd_Connect     
[Microsoft-Windows-WLAN-AutoConfig]Calling MSMSecStopSecurity  
[Microsoft-Windows-WLAN-AutoConfig]Adapter({0ddb0198-3602-4de5-a5f5-e0826970c91e}) Received StopSecurity  
[Microsoft-Windows-NWiFi]Reset PHY New MAC address 0x*MyMAC* SetDefaultMIB=true   
[Microsoft-Windows-WLAN-AutoConfig]FSM Transition from State: Disconnected to State: Reset  
[Microsoft-Windows-WiFiNetworkManager]WlanMgr - Recieved wlan notif: wlan_notification_acm_profile_change   
[Microsoft-Windows-WiFiNetworkManager]NotifMgr - Publishing new WNF connection state, type = WIFI_NOTIF_TYPE_AVAILABLE , state = 0x0, ntStatus = 0x0.  
[Microsoft-Windows-WiFiNetworkManager]NotifMgr - Publishing new WNF connection state, type = WIFI_NOTIF_TYPE_CONNECTION , state = 0x1, ntStatus = 0x0.   
[Microsoft-Windows-WiFiNetworkManager]NotifMgr - Publishing new WNF connection state, type = WIFI_NOTIF_TYPE_PREFERRED , state = 0x0, ntStatus = 0x0.  
[Microsoft-Windows-WLAN-AutoConfig]Scan completion Status 0  
[Microsoft-Windows-WiFiNetworkManager]WlanMgr - Recieved wlan notif: wlan_notification_acm_scan_complete  
[Microsoft-Windows-WiFiNetworkManager]WlanMgr - Recieved wlan notif: wlan_notification_acm_scan_list_refresh  
[Microsoft-Windows-NWiFi]OID_DOT11_RESET_REQUEST Complete 0x0 ResetConfirmStatus=0x0  
[Microsoft-Windows-WLAN-AutoConfig]FSM Current state Reset , event Reset_Success  
[Microsoft-Windows-WLAN-AutoConfig]SSID = xxx BSSIDCount = 0   
[Microsoft-Windows-NWiFi]Desired SSID List 1 entries   
[Microsoft-Windows-NWiFi]Set DesiredBSSType: infrastructure  
[Microsoft-Windows-NWiFi]Set HiddenNetworkEnabled (false): 0x0   
[Microsoft-Windows-WLAN-AutoConfig]FSM Transition from State: Reset to State: Ihv_Configuring  
[Microsoft-Windows-WLAN-AutoConfig]FSM Current state Ihv_Configuring , event IHV_Pre_Security_Success  
[Microsoft-Windows-WLAN-AutoConfig]Calling MSMSecPerformPreAssociateSecurity   
[Microsoft-Windows-WLAN-AutoConfig]Adapter({0ddb0198-3602-4de5-a5f5-e0826970c91e}) MSM Connect notification, Network "xxx"   
[Microsoft-Windows-WLAN-AutoConfig]WLAN Security Settings: BSS Type  infrastructure , Authentication Open , Encryption WEP , OneX Enabled No , Eap Information - Type 0, Vendor ID 0, Vendor Type 0, Author ID 0  
[Microsoft-Windows-WLAN-AutoConfig]Adapter({0ddb0198-3602-4de5-a5f5-e0826970c91e}) IntfSecState Transition INITIALIZED -->PROCESSING_PREASSOCIATE  
[Microsoft-Windows-WLAN-AutoConfig]FSM Transition from State: Ihv_Configuring  to State: Configuring  
[Microsoft-Windows-NWiFi]Enabled AuthList 1 entries  
[Microsoft-Windows-NWiFi]Set ExcludeUnencrypted (true): 0x0   
[Microsoft-Windows-WLAN-AutoConfig]Default Key: Idx 0, Algo WEP , Direction= Both , Len x  
[Microsoft-Windows-WLAN-AutoConfig]Default Key ID set to Index 0  
[Microsoft-Windows-NWiFi]IOCTL function=0xD4 Status=0xC0000010 Length=688 bytes 
[Microsoft-Windows-WLAN-AutoConfig]Adapter({0ddb0198-3602-4de5-a5f5-e0826970c91e}) IntfSecState Transition PROCESSING_PREASSOCIATE -->PREASSOCIATE_DONE
[Microsoft-Windows-WLAN-AutoConfig]Adapter(5) Connect Completion, Reason 0, Error 0  
[Microsoft-Windows-WLAN-AutoConfig]Security PreConnect Completion, security reason: 0x0, error 0x0   
[Microsoft-Windows-WLAN-AutoConfig]FSM Current state Configuring , event Pre_Security_Success  
[Microsoft-Windows-WLAN-AutoConfig]Wireless network association started. Network Adapter: Qualcomm Atheros AR9485WB-EG Wireless Network Adapter  Interface GUID: {0ddb0198-3602-4de5-a5f5-e0826970c91e}  Local MAC Address: xx:xx:xx:xx:xx:xx  Network SSID: xxx  BSS Type: Infrastructure  Authentication: Open  Encryption: WEP  802.1X Enabled: No    
[Microsoft-Windows-NWiFi]Security endpoint type = Standard Security  
[Microsoft-Windows-NWiFi]IHV Serialization Enabled: false   
[Microsoft-Windows-WiFiNetworkManager]AutoConnect - ConfigureAutoConnectNetworksInternal: Confirmation Timer - TimeLeft = [0] msecs    
[Microsoft-Windows-NWiFi]IOCTL_DOT11_CONNECT   
[Microsoft-Windows-NWiFi]OID_DOT11_CONNECT_REQUEST completes 0x0   
[Microsoft-Windows-WLAN-AutoConfig]FSM Transition from State: Configuring  to State: Associating  
[Microsoft-Windows-WiFiNetworkManager]NotifMgr - Publishing new WNF connection state, type = WIFI_NOTIF_TYPE_AVAILABLE , state = 0x0, ntStatus = 0x0.   
[Microsoft-Windows-NWiFi]Connection Started   
[Microsoft-Windows-NWiFi]Connection Completion Status=0xC000023C   
[Microsoft-Windows-WLAN-AutoConfig]FSM Current state Associating , event **Upcall_Association_Failure**  
[Microsoft-Windows-WLAN-AutoConfig]Calling MSMSecStopSecurity   
[Microsoft-Windows-WLAN-AutoConfig]Adapter({0ddb0198-3602-4de5-a5f5-e0826970c91e}) Received StopSecurity   
[Microsoft-Windows-WLAN-AutoConfig]Adapter({0ddb0198-3602-4de5-a5f5-e0826970c91e}) IntfSecState Transition PREASSOCIATE_DONE -->STOPPING_SECURITY  
[Microsoft-Windows-WLAN-AutoConfig]Received Security Packet: CONNECT_COMPLETION   
[Microsoft-Windows-WLAN-AutoConfig]Received CONNECT COMPLETION, status 0xC000023C, assocStatus 0x2   
[Microsoft-Windows-WLAN-AutoConfig]Adapter({0ddb0198-3602-4de5-a5f5-e0826970c91e}) IntfSecState Transition STOPPING_SECURITY -->INITIALIZED    
[Microsoft-Windows-WLAN-AutoConfig]Adapter({0ddb0198-3602-4de5-a5f5-e0826970c91e}) MSM Disconnect notification   
[Microsoft-Windows-WLAN-AutoConfig]Connect completion reason 0x38002, session 0x1, **adhoc formed false**   
[Microsoft-Windows-WLAN-AutoConfig]FSM Transition from State: Associating  to State: Disconnected  
[Microsoft-Windows-WLAN-AutoConfig]Connection complete on interface Qualcomm Atheros AR9485WB-EG Wireless Network Adapter, session = 0x1, status = 0x38002, **ad hoc network formed = false**   
[Microsoft-Windows-WLAN-AutoConfig]**Connect Diagnostic Information  Interface** GUID: {0ddb0198-3602-4de5-a5f5-e0826970c91e}  Network Adapter: Qualcomm Atheros AR9485WB-EG Wireless Network Adapter Connection Mode: profile   SSID: xxx  BSS Type: infrastructure  Authentication: Open   Encryption: WEP   802.1X Enabled: 0  IHV Bitmap: 5  Hidden: false  Peer MAC: 00:00:00:00:00:00  WLAN Status  Code: 229378  Dot11 Status Code: 0x2  Assoc Time: 4294967295  Assoc Restart Count: 0  Auth Time: 0  Auth Restart Count: 0  Device ID: PCI\VEN_168C&DEV_0032&SUBSYS_2C971A3B&REV_01\4&AE113B&0&0020  Device Manufacturer: Qualcomm Atheros Communications Inc.  Driver Service: athr  Driver Version: 3.0.2.201  Driver Date: 2-27-2016  RSSI: -68  Signal Quality: 62%  Channel: 0  Interfering AP Count: 0  Total Visible AP Count: 9  Max AP Phy Type: any  Max AP Channel Width: 0  AP Description:   AP Manufacturer:   AP Model Name:   AP Model Number:  Detailed Status On Roam: 0xFFFFFFFFRx Rate:0  Tx Rate: 0  EAP Type: -1 802.1x Auth Mode: None  HotSpot 2.0: false  Profile Type -1  System MAC Randomization: 1  Profile MAC Randomization: 0   
[Microsoft-Windows-WLAN-AutoConfig]Connection failed. Interface = Qualcomm Atheros AR9485WB-EG Wireless Network Adapter, Reason code = 0x38002.    
[Microsoft-Windows-WLAN-AutoConfig]Media notification received. Interface = Qualcomm Atheros AR9485WB-EG Wireless Network Adapter, Connected = false.  
[Microsoft-Windows-WLAN-AutoConfig]WLAN AutoConfig service failed to connect to a wireless network. Network Adapter: Qualcomm Atheros AR9485WB-EG Wireless Network Adapter Interface GUID: {0ddb0198-3602-4de5-a5f5-e0826970c91e}  Connection Mode: Manual connection with a profile  Profile Name: xxx  SSID: xxx BSS Type: Infrastructure  **Failure Reason:The specific network is not available.  RSSI: 255**

Issue

• So, everything seems to go OK, but then system seems to lose the sight of the router even though the signal is super strong (RSSI: 255) and refuses to continue the connection.

What Works

• All the other devices work perfectly normal and there's no reason to suspect that router has any problems. At the same time, laptop connects to any other network also without any problems.

There just seems to be some particular hating between these two. The problem is not system related since I'm running dual boot with Win 7 and Win 10 and the situation is identical.

In looking into your logs, it seems that your RSSI is -68 (which is good). It also seems that you are using WEP as a security mechanism. Some newer wireless drivers no longer support WEP as mandated by the Wi-Fi Alliance. Please change your security to WPA2-PSK and see if your laptop associates to the Access Point (or in your words, the router). Let me know how it goes.