No combination Alt + a, c, e. Only characters a, e without ę, ą.

Hello. I have a problem with the keyboard. Well, one day I noticed that I don't have Polish type marks; ą, ę, ć but only a, e, c etc.
I have tried all the combinations I found on the internet; alt + shift, alt + ctrl + z and stuff like that didn't work or help.
After entering Control Panel> Regional and Language Options> Languages> Details, I have selected:

Default language = Polish - Polish (Developers)
Installed Services = Polish
* Polish (Programmer)

When I select the last Programmer's Polish and click Add, the Add Language window opens and in the Language tab, Polish is selected, and in the Keyboard Layout / IME tab, the United States is selected.

I tried to look for Poland instead of the United States, but I didn't find it.
Someone told me that there is no such option that there is no Polish choice there and that this is the main reason for this.

I do not know if it matters, but some time ago my graphics burned down and with the help of a colleague I was able to switch in a system under Bios or Dos, I do not know exactly how to pronounce it to start the system with a Graphics Card built into the Motherboard.

In system services, disable the option corresponding to keyboard shortcuts to the integrated graphics card. Polish characters will definitely come back then.

how to get into these system services?

Added after 51 [seconds]:

it is Polish 214 but there are still no Polish characters

The system is Windows Xp Professional and the graphics card was Asus but it burned out
I have a photo octore you are asking

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https://obrazki.elektroda.pl/2833257700_1382979120.jpg

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https://obrazki.elektroda.pl/9371458900_1382979213.jpg

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so far I have not solved the problem. I am asking for a detailed description of what and how, i.e. how to do it. as I wrote above, I am not fluent in computer use. the concept of system services or other does not mean anything to me

Added after 21 [minutes]:

the letters Y and Z are in place. the problem is with writing O with a dash or Z with a dash, if the dot does not have these characters!

Nothing helps

I tried all the sequences and nothing but any reaction from the system. The problem is still there and I can't solve it, I don't know where it came from. I only remember that the first graphics card fell to me, it was rearranged in the system so that the graphics from the motherboard would work, but everything worked correctly Polish characters on the keyboard were. Later, I replaced it with another keyboard because the one was flooded and the eye was working too, until one day, while sitting on the Internet, I noticed that I was missing Polish characters and the PL badge on the bottom bar of the desktop disappeared. If it helps to solve the problem, it will resend screenshots of individual settings in the control panel.

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https://obrazki.elektroda.pl/8610416600_1385299637.jpg
https://obrazki.elektroda.pl/2938473600_1385299725.jpg
https://obrazki.elektroda.pl/9813627500_1385299749.jpg
https://obrazki.elektroda.pl/9935759100_1385299780.jpg
https://obrazki.elektroda.pl/5692737200_1385299802.jpg
https://obrazki.elektroda.pl/5928639900_1385299829.jpg

but I don't have English to choose from, so it will be a bit difficult.
after entering the regional options> jeszyki> details and developing, I have a choice of Polish

I did as you ordered, after changing to English, all characters are in Polish, i.e. the lack of those above, it did not bring any effect.
what screen keyboard?
I do not have such a keyboard, I do not understand what is going on.

Added after 1 [minutes]:

Thanks for the last 3 months I have already reinstalled the system several times, so I already have enough of this system and computer!

Added after 1 [hours] 4 [minutes]:

Oki, I do not know if it is but I found it on the Internet that I could accidentally press the Alt + L, X key combinations ... and then we do not receive Polish characters (ł, ź ...) and I have that there are no such characters both when writing on the Internet and in Word or notebook, I have a Polish programmer marked and nothing changes, no combinations, etc. work, neither large nor small letters are there.
and after such a combination you have to upload some files to the system, that's crap.
I won't do it myself, I'm just bad at computers.
that it is related to the lack of a graphics card and the change of graphics to graphics from the motherboard.
so, as for me, it was wiped clean!

oki. I opened this keyboard and in it the characters I wanted appear, but I will not open this keyboard all the time

I close the topic, solved. english keyboard