How to enble touch screen on my toshiba satellite C55-A?

according to the maker there is no C555t
a c55t-1234 (note the vast submodels not stated by you....1233 is m fact sub number what is yours?
but is kinda off topic but gee, wrong model stated out of the gate.
Ok what update is running, we cant see your screen
1: tell all words on screen and logo's
2: post photo of failing screen

sorry we can not guess WHAT is updating
good luck. for sure.

get to the audio in settings and adjust bass and treble effects

none the laptop will return to the state it arrived in when new.It will require windows to be updated though.

search for switch or button to activate wireless on your device. Have you verified that the Bluetooth radio is turned on? If the radio is off, then nothing may show in Device Manager. Look under Network Cards - unless your BT radio exposes a PAN (personal area network), you won't find anything there. You need to look under the "Bluetooth Radios" section.

According to Toshiba's specifications, yes it does. http://www.toshiba.com/us/computers/laptops/satellite/C50/C55-A5302

Replace it it's factory bug in your screen

Is it windows 7 or 8? Internet Explorer modern (tablet mode), or desktop mode (the one that opens while on your desktop)? Internet Explorer 10 or 11? Ia the text very large or small? Does it only happen in Internet Explorer, or does text appear blurry in other apps? Are those apps desktop mode or tablet mode apps?

To get enable or disable the Touch Pad you have to pulse the Fn + F9

You can also set this function as follow:

Start >> Control Panel >> Printers and other hardware

Click Mouse >> Touchpad (enable or disable)