Shut off computer, maybe wait 10 or more seconds-- why that is sometimes helpful I dunno ---and reboot fixes some, if not many presumed problems i.e. I've relearned recently-- cause I had forgot ---that rebooting often times solves problems.
I too am relatively new to my used 2007, Toshiba(2009), A135 Satelite 1.73 Ghz,Intel core duo laptop. Minor buggies and some I figured out others not.
Recently did lastest security updates after waiting, reading/research here and all went well for a day or two. Also there was a strange Toshiba update that appeared and I processed it. Presumed it was not a viral/trojan/malware bug, as my free anti-bug defender and Avast said nothing about it.
I had done the Toshibal update twice-- sperate day cause I think I clicked incorrect something first time around but still had turned off computer at twice since then and all was ok. Also done a defrag later that day.
Then the next moring( yesterday ) turn-on computer and notice the Toshiba BIOS screen had larger font than than normal. So then I get to main screen and network adaptor driver is said to be missing cannot find and I have no access to my WIFI etc.....
I forgot the reboot golden rule, and while computer is still on, I go to office where there is ethernet cable access to computer. Still no access. Finally I reboot and Toshiba BIOS screen no longer has large font, and I have cable access to internet.
Go back home start computer again, and now all is bacl to normal WIFI access etc ergo I never needed to find a new network adpator driver...whew!
So the simple mora(?) and reminder of this story isto Avoid Panic--- good advice in general ---and remember to try rebooting procedures at least once, when computer doesn't want to play nice.