İnternetten deneme sürümünü indirince programı hemen yükledim.

İnternetten means from the internet.

It is made of:

• internet
• -ten / -dan / -den / -tan = the ablative ending, often meaning from

So:

• internetten = from the internet

The form is -ten here because of Turkish sound harmony and consonant harmony.

You will often see this pattern with places or sources:

• okuldan = from school
• evden = from home
• marketten = from the market

In this sentence, it tells you the source of the download.

Deneme sürümünü means the trial version as the object of the verb.

It comes from:

• deneme = trial / test
• sürüm = version / edition
• sürümünü = the version
  • object marking

So the base noun phrase is:

• deneme sürümü = trial version

This is a noun compound, very common in Turkish. Literally it is something like trial version.

Then it becomes deneme sürümünü because it is the definite direct object of indirmek (to download).

Because the phrase is a definite direct object.

The basic compound is:

• deneme sürümü = the trial version / trial edition

When that compound is used as a definite object, Turkish adds the accusative ending:

• deneme sürümünü

This looks a little complicated because compounds already contain possessive-type endings inside them.

A rough breakdown is:

• sürüm = version
• sürüm-ü = its version / version of it → part of the compound structure
• sürüm-ü-nü = that version as a definite object

You do not need to memorize the whole internal grammar at once, but it helps to recognize that -nü here is the object marking added after the compound form.

İndirince means something like:

• when I downloaded
• once I downloaded
• after downloading

It comes from:

• indirmek = to download / to bring down
• indir- = verb stem
• -ince / -ınca = a converb ending meaning when / once / after

So:

• indirince = when/once (someone) downloaded

In this sentence, the person is understood to be I, because the main verb is yükledim (I installed), and normally the subject of -ince matches the subject of the main clause unless context shows otherwise.

Because -ince clauses usually do not mark the person directly.

Turkish often leaves the subject to be understood from context. In this sentence:

• yükledim = I installed

So we naturally understand:

• indirince = when I downloaded

This is very common in Turkish. The subject of the subordinate clause is often inferred from the main clause.

Because programı is also a definite direct object.

• program = program / software
• programı = the program

Turkish usually marks a direct object with the accusative when it is specific or definite.

Compare:

• Program yükledim. = I installed a program.
• Programı yükledim. = I installed the program.

In your sentence, it is a specific program, so programı is correct.

Hemen means immediately / right away.

So:

• programı hemen yükledim = I installed the program right away

It adds the idea that the installation happened very soon after the download.

Its position is natural in Turkish. Adverbs like hemen often appear before the verb or near the part they modify.

Yükledim comes from yüklemek, which in technology contexts often means:

• to install
• to load
• sometimes to upload, depending on context

Here it means I installed.

Breakdown:

• yükle- = install/load
• -di- = past tense
• -m = I

So:

• yükledim = I installed

In software contexts, Turkish commonly uses:

• indirmek = to download
• yüklemek = to install / load

So the sequence makes sense:

1. download the trial version
2. install the program

Turkish often puts the background or time clause first and the main action later.

So the structure is:

• İnternetten deneme sürümünü indirince = when I downloaded the trial version from the internet
• programı hemen yükledim = I installed the program right away

This order is very natural in Turkish.

Also, Turkish generally places the main verb at the end of its clause, so:

• object + adverb + verb
• programı hemen yükledim

Yes. A very close alternative is:

• İnternetten deneme sürümünü indirdikten sonra programı hemen yükledim.

This means:

• After downloading the trial version from the internet, I installed the program right away.

Difference in feel:

• indirince = when / once / after downloading
• indirdikten sonra = after having downloaded

Both are correct.
-ince is often a bit shorter and more direct.
-diktan sonra can sound slightly more explicitly sequential.

It can mean both, depending on context.

In many real sentences, -ince has the sense of:

• when
• once
• after

Here, because the second action happens immediately afterward, English might translate it naturally as either:

• When I downloaded the trial version from the internet, I immediately installed the program.
• After downloading the trial version from the internet, I immediately installed the program.
• Once I had downloaded the trial version from the internet, I immediately installed the program.

So the exact English wording depends on style, but the Turkish is perfectly natural.

Because Turkish often drops subject pronouns when the verb already shows the person clearly.

Here:

• yükledim already means I installed

So adding ben (I) is usually unnecessary unless you want emphasis.

For example:

• Ben programı hemen yükledim. = I installed the program right away.
  This sounds more emphatic, as if contrasting with someone else.

Without ben, the sentence is more neutral and natural.

No, but it is a very common and natural way.

Other possibilities include:

• internetten = from the internet
• internet üzerinden = via the internet / over the internet

So you could also say:

• İnternet üzerinden deneme sürümünü indirince programı hemen yükledim.

But internetten is shorter and very idiomatic.

Normally, yes.

In a sentence like this, Turkish readers naturally understand that the person who downloaded the trial version is also the person who installed the program.

So the sentence is understood as:

• When I downloaded the trial version from the internet, I immediately installed the program.

If the subjects were different, Turkish would usually need a clearer structure to avoid confusion.

It has two parts:

1. İnternetten deneme sürümünü indirince
   = a subordinate clause with -ince, giving the time/background

2. programı hemen yükledim
   = the main clause

A simple structural breakdown:

• İnternetten = from the internet
• deneme sürümünü = the trial version
• indirince = when/once I downloaded
• programı = the program
• hemen = immediately
• yükledim = I installed

So the whole sentence is a very typical Turkish pattern:

[time/background clause] + [main clause]