Se il computer si blocca, provo a riavviare il sistema.

Because Italian often uses the present tense in both parts of a sentence like this when talking about:

• a general rule
• a habitual reaction
• something that happens whenever the condition is met

So:

• Se il computer si blocca = if the computer freezes
• provo a riavviare il sistema = I try to restart the system

This is like saying: Whenever that happens, this is what I do.

In Italian, this is very natural. English also does something similar in sentences like:

• If it rains, I stay home.
• If the computer freezes, I restart it.

Italian usually does not use the future after se in this kind of sentence.

Se means if, so it introduces a condition.

• Se il computer si blocca... = if the computer freezes...

Quando means when, which usually sounds more certain:

• Quando il computer si blocca... = when the computer freezes...

So the difference is:

• se = maybe it happens
• quando = presented as something that does happen / whenever it happens

In many everyday situations, both can make sense, but se is the normal choice for a basic conditional sentence.

Bloccarsi is the verb here, not just bloccare.

• bloccare = to block something
• bloccarsi = to get blocked, to freeze, to seize up, to stop responding

So:

• Il computer blocca il sistema would mean the computer blocks the system
• Il computer si blocca means the computer freezes / gets stuck

The si is part of this reflexive/intransitive form. In many cases, Italian uses a reflexive-style verb where English uses a non-reflexive verb.

Very common pattern:

• La porta si apre = the door opens
• Il computer si blocca = the computer freezes

Because provare is commonly followed by a + infinitive when it means to try to do something.

So:

• provo a riavviare = I try to restart

This is the normal structure:

• provare a fare qualcosa

Examples:

• Provo a chiamarlo = I try to call him
• Provo a dormire = I try to sleep
• Provo a riavviare il sistema = I try to restart the system

Without a, the sentence sounds wrong in standard Italian.

They are related, but not the same.

• riavviare = to restart / reboot
• riaccendere = to turn back on

For a computer or system:

• riavviare il sistema means restart it from within the operating system or by rebooting it
• riaccendere il computer means turn it on again after it has been off

So if the computer freezes, riavviare is the more precise word.

Italian uses definite articles much more often than English.

So in Italian, it is very normal to say:

• il computer
• il sistema

even where English might say:

• computer
• system

This is especially common when talking about something specific or understood from context.

Here, il computer and il sistema sound completely natural. Leaving out the article would usually be wrong.

Yes, computer is normally treated as masculine, so it takes:

• il computer
• un computer

Many borrowed English nouns in Italian get assigned a gender, and computer is masculine.

So you would say:

• Il computer è lento
• Questo computer si blocca spesso

Yes, but it means something slightly different.

• Se il computer si blocca = if the computer freezes / gets stuck
  
  • focus on the moment it happens
• Se il computer è bloccato = if the computer is frozen / is stuck
  
  • focus on the state or condition

So:

• si blocca = action/event
• è bloccato = result/state

In your sentence, si blocca is very natural because it describes the problem occurring, and then your reaction.

Because Italian usually drops subject pronouns when they are not needed.

The verb form provo already tells you the subject is I.

So:

• provo = I try

You could say io provo, but that usually adds emphasis, contrast, or clarification.

For example:

• Io provo a riavviare il sistema, tu controlla i cavi.
  = I’ll try restarting the system, you check the cables.

In a normal sentence, just provo is enough.

The comma separates the if-clause from the main clause:

• Se il computer si blocca, = if the computer freezes,
• provo a riavviare il sistema. = I try to restart the system.

This is very common and helpful for clarity, especially when the se clause comes first.

If the order were reversed, the comma is often omitted:

• Provo a riavviare il sistema se il computer si blocca.

Both word orders are possible.

It can very naturally mean a general habit or usual response.

So it often means:

• If the computer freezes, I try restarting the system
• Whenever the computer freezes, I try to restart the system

Depending on context, it could also refer to a present situation, but the most natural reading is usually a general procedure or repeated action.

It can happen, but it is much less common in ordinary speech for this kind of statement.

The normal, natural version is:

• Se il computer si blocca, provo a riavviare il sistema.

Using future forms:

• Se il computer si bloccherà, proverò a riavviare il sistema

sounds more formal, more predictive, or tied to a particular future situation. In everyday Italian, the present tense is usually preferred in simple conditionals like this.

Not exactly.

• computer = the machine/device
• sistema = the system, usually the operating system or the software environment

So the sentence is saying:

• if the computer freezes,
• I try to restart the system

In practice, people may use these words a bit loosely in everyday tech talk, but they are not identical.

It is made from:

• avviare = to start, launch
• ri- = again

So:

• riavviare = to start again, restart, reboot

This prefix ri- is very common in Italian:

• fare → rifare = do again
• leggere → rileggere = read again
• aprire → riaprire = reopen

So riavviare literally has the idea of starting again.