AUTHORIZED SERVICE

ovlasteniservis

Dear users, due to the large number of phone calls, we are not able to answer all of them, the main reason is that most of the calls ask questions that belong to the sphere of the Help-desk (Technical Support) and require a longer time for a quality answer about technical settings such as software- as well as hardware, and in this way valuable time is taken away from service reception operators who cannot devote themselves to the basic work, which is receiving and issuing devices for service.

More details about the current situation, location of the service, and how to get there can be found here: FAQ

Zel Cos B2B 800x800

System integration

System integration

Solutions backed by reputable manufactures

Service

Service

Servicing during the warranty period and afterwards

IT Sales

IT Sales

Find your optimal hardwer - "best buy"

Microsoft

Microsoft

Microsoft tehnical support

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Što nikako ne smijete raditi kad se laptop pregrije

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Savršena kombinacija za vrhunske performanse

HP preporučuje Windows 11 Pro za posao

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Novi Windowsi / macOS – isplati li se odmah nadograditi?

Svake godine ili dvije, Microsoft i Apple izbacuju nove verzije svojih operativnih sustava: novi Windows 11/12 ili macOS Sonoma/Sequoia dolaze s novim...

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10 Jun 2025

Najčešći IT problemi u malim firmama – i kako ih spriječiti

Mala firma znači i puno uloga u jednom – često isti čovjek vodi prodaju, piše račune i "pazi na računala".

ZelCos Grenke

System integrations

Starting a new business, or thinking of refreshing the information technology infrastructure, be sure to contact us and use our know-how and expertise. We will offer a high quality  services, hardware and solutions in full, which will help you optimize your business expenses. Construction and maintenance of computer systems.

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IT sales

With IT sales Zel-Cos is completing his offer as a leading IT service of equipment and estabilished system integrator. We met needs of our clients and trends in IT market. We adopt to needs of our clienst and some services we predefinied. 

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Zel-Cos d.o.o. electronic-information services and marketing, Nova cesta 166, 10000 Zagreb. Account number: 2360000-1101194923, IBAN: HR5323600001101194923 at Zagrebacka banka d. d., 2500009-1101365330, IBAN: HR3725000091101365330 at HYPO ALPE-ADRIA-BANK d.d. and
2340009-1110626430, IBAN: HR4523400091110626430 at Privredna banka Zagreb d.d. The share capital amounting to 149,000.00 HRK, paid in full. Director Dubravko Puhelek. Tax number: 03693350, OIB: 07306591551

How to file a complaint? / General Terms of Business / CID (Customer Induced Damage)

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