Fixed my difficult problem. Thanks!!! took me days to solve this.
I had run an automatic reboot scandisk, unattended and it corrupted the computer. Initially NO WIFI at all, even though device was installed. I went through the MS procedure to repair automatic update, which involved net STOP various services. Can't remember
links, as it was on my smartphone.
Once all the regsrv32.exe various .dlls, were reset and rebooted, I had limited WiFi access.
Running the troubleshooter, it said Diagnostic Services not running, which is how I got to here.
note: previously...
sfc /scannow was run and this did nothing for the problem.
ipconfig /all
showed a blank Default Gateway field
Wireless LAN adapter Wireless Network Connection:
Connection-specific DNS Suffix . : Home
Description . . . . . . . . . . . : Realtek RTL8191SE Wireless LAN 802.11n PCI-E NIC
Physical Address. . . . . . . . . : 70-1A-xx-xx-xx-A5
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::xxxx:xxxx:a000:ccd5%12(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.7(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, 13 July 2015 13:16:12
Lease Expires . . . . . . . . . . : Tuesday, 14 July 2015 13:16:12
Default Gateway . . . . . . . . . : 192.168.1.1 <<<<--- this field was blank
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 32xxxxxx6
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-13-09-xx-xx-xx-5A-B6-76-24-4A
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled
Whoopeee!!!!
I tried all of those things and I finally got it fixed:
go to start ,search and type:- cmd, right click on returned cmd.exe and select "run as administrator" at the prompt type:-
net localgroup Administrators /add networkservice
press enter then type:
net localgroup Administrators /add localservice
press enter then type:
exit
press enter and restart your computer
Open services and make sure the service is started.
Thanks again.