Sony Xperia Z1 - Sony Xperia Z1 Compact - restarts, hangs off

Hello,
Since yesterday I have a problem with my Sony Xperia Z1 Compact phone.
The phone restarts itself, turns off, and I also see that it has problems with various applications. What can I do and where to start? Or just the service, I never had this problem before but now I can clearly see that there is something wrong, my phone has not fallen anywhere.

Use xperia companion and repair your phone.

At this time, unfortunately, I can not use this program because I have a broken computer: /
Added after 33 [minutes]:
Is there any other possibility of tampering with the phone yourself?
I will probably have a computer at the end of the week so I can check it through this program ... and for now it restarts and hangs non-stop, what someone calls, I touch the display it hangs. Anyone had anyway?

Take it to the site if you don't have access to a computer.

If I have access at home, I will check. I have checked the Kasperski system so far but there are no viruses. It looks like damage to the touch or technical damage in the middle of the electorniki or re-upload the software, but I doubt it would help ..: /

It may also be to blame for the battery.

Well, I see that the problem is rather serious, because it turns on all the time, turns off, restarts. Probably only the service will save him ... or not.

Added after 2 [hours] 21 [minutes]:

Also, I get the sonyxpetiacrashmonitor error every now and then ....

I picked up the phone from the website. Generally, it works, but there is a message from time to time - "Crashmonitor" what does it mean? Is something wrong with the phone or is it normal?

Use the repair phone option in Xperia Companion.
Write what the website has repaired in it.

I forgot about this program, what you say, when I am at home, I'll do it tomorrow.
And the service says in the protocol that new software has been downloaded and the ALEEE has been mechanically repaired in my way, still something is wrong because mimi that as such it works is mime everything that hangs from time to time or whether any applications will hang up and the error will end either restart or this error pops up. Evidently I noticed that something is not working or the processor or the framework can be seen that when I drag the finger across the screen, it reacts with minimal but delay ... I think they did it to me only because the warranty was leaping or ending ...

Added after 14 [minutes]:

I will add a link yet because I found a similar topic, the message that pops up to me sounds like in this post:
https://www.elektroda.pl/rtvforum/topic3353331.html I will try to do as you say, I will try to uninstall applications at least fb for now and the rest will see how it will go because they can spoil everything. What turns on some app hangs and heats, and it can be the reason for the disc, arm etc.

After uninstalling the facebook application and some small applications, I see that the problem has disappeared. The phone does not overheat, does not freeze, there is no crashekran error etc ...
Could these applications be the reason for such errors in my phone? Maybe it was these applications that damaged my mechanical part, the mainboard of the phone or something else? Anyone know anything about this?

Hey, are you following something about these new applications on the Xperie Z1 compact? is it fb or some games are hanging and is there a crasch monitor? Will these applications no longer go to this phone? Maybe they have too big requirements for this phone?