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How to switch from Windows 10 Home to Windows 10 Professional without reinstallation

Upgrade your version of Windows without having to completely reinstall your PC's operating system. Switching from a version of Windows 10 Home to a version of Windows 10 Pro isn't as complicated as you might think. If you imagined a complete system reinstallation to switch from one version to another, you were wrong. Microsoft has done it right. Upgrading a Windows 10 Home to a Windows 10 Professional is done by simply changing the product key saved in the system settings. You will therefore only have to buy a Windows 10 Professional product key that you will enter in place of the one already present on your machine. Even better, if you already have a Windows 7 Professional, Windows 7 Ultimate, or Windows 8 / 8.1 Pro product key, for example from a machine that you no longer use, you can normally use it to upgrade your Windows 10 Home to Windows 10 Professional. Windows can be unpredictable at times, so be sure to make a full backup of the data stored on your computer before st

How to choose the right USB Type-C charger for your mobile devices



Chargers over 30 W become versatile thanks to the USB Power Delivery 3.0 standard ... provided you choose the right power. Our advice on making no mistakes.

In order to charge mobile devices faster, manufacturers regularly increase the power of their chargers. Thus, those intended for smartphones went in a few months from 5 W to 10 W, then to 15 and 18 W. Oppo will even go further with its 65 W smartphone charger, a power normally used for laptops.


With the generalization of USB Type-C for charging ultraportables, we dream of ultra versatile chargers that would be suitable for notebooks, tablets and smartphones. Moreover, Apple already offers this type of accessory with three USB Type-C chargers:


A 30 W model (55 euros), compatible with iPhone (from model 8), the seventh generation iPad, the iPad Pro (10.5 inches, 11 inches, 12.9 inches), the iPad Air generation, fifth-generation iPad mini, 12-inch MacBook Retina (2015 to 2017) and 13-inch MacBook Air Retina (from 2018).

A 61 W model (75 euros), which also supports 13-inch MacBook Pro (from 2016).

A 96 W model (85 euros), which adds compatibility with the 15-inch (2016 to 2019) and 16-inch (2019) MacBook Pro.

These chargers can be replaced by a charger from another manufacturer, provided that it is compatible with the Power Delivery 3.0 standard (the PD label is present on the box). This standard allows a mobile device to communicate with the charger via a USB Type-C link to define the best voltage (5 V, 9 V, 15 V or 20 V) and the best charging current (from 0.1 to 5 AT). Recent iPhones can thus be recharged using a USB Type-C to Lightning cable. Note that a smartphone or charger with a USB Type-C port is not necessarily Power Delivery compatible. It is therefore necessary to verify that the mobile device that you want to charge complies with the standard.


A Power Delivery 3.0 charger can also include the PPS (Programmable Power Supply) protocol, which allows the voltage to be increased gradually during charging, in order to make the operation more efficient. This protocol makes it possible in particular to obtain voltages which are not initially foreseen. For example, the Galaxy Note 10+ and the latest Galaxy S20 Ultra come with 25W chargers, but also accept 45W charging power (10V and 4.5A). For this, the 45 W charger must be compatible with Power Delivery 3.0 and PPS in order to go from 9 to 10 V.


More compact chargers

The other development in the field of chargers concerns the arrival of GaN (gallium nitride) technology. Used instead of silicon, this material makes it possible to design smaller, more efficient charger components with less energy loss. For example, Anker offers the 30W PowerPort Atom PD1 model which is 40% smaller than the equivalent charger at Apple (non GaN).


Who can do the most can do the least

Thanks to the Power Delivery standard of USB Type-C, chargers gain universality and a high power model can also power devices that require less watts, without the risk of overheating ... if they are well compatible with the standard. Thus, a laptop charger will also work with your tablet and your smartphone. It is also possible to use, for example, a 30 W model with a computer that requires 60 W, if the supply voltage is respected. The charging time will just be significantly longer. Also, using a 60W Power Delivery charger on a smartphone that accepts a maximum of 18W will not cause overheating, but will not make charging faster than with an 18W charger.


Note that some devices advertised as 60 W models with multiple USB ports are misleading. The total power is, in fact, not available from a single port (the 60 W will, for example, be divided into two 30 W ports). Finally, choose branded products (RAVPower, Anker, Baseus, Aukey, Ugreen), on which the CE mark appears, to avoid possible overheating or short-circuit problems.


Our selection of five USB Type-C chargers with Power Delivery

Baseus 65W USB C Charger


This charger is able to provide a power of 65 W on its first USB Type-C port, to charge a laptop, or to distribute it over several ports (30 W maximum on the other two ports). It has the PD / PPS protocol and allows fast charging on most smartphones (SCP, FCP, QC 3.0 and AFP technologies).


Price: around 50 euros.


Anker PowerPort + Atom III mini


This 30W USB Type-C charger is one of the most compact on the market. It benefits from Anker's new PowerIQ 3.0 technology which offers Power Delivery 3.0 and Quick Charge 3.0 compatibility. It works with fast charging of Apple and Samsung smartphones and can also charge an iPad, as well as a 12 inch MacBook.


Price: around 30 euros.


AUKEY USB C Power Charger 60 W


This compact charger incorporates a USB Type-C port and a USB Type-A port. With Dynamic Detect technology, it offers 60 W of power on the single USB Type-C port, which can power a 13-inch ultraportable. This port rises to 45W when used in conjunction with the second connector (12W maximum).


Price: around 50 euros


RAVPower 60W USB C Power Delivery Charger


This charger has four USB Type-A ports and one USB Type-C port. The latter is Power Delivery compatible and offers up to 45 W of power, which can charge a 13-inch laptop. USB Type-A ports can reach up to 12W (5V and 2.4A).


Price: around 35 euros.


Ugreen PD 30W USB C Charger


This USB Type-C charger is small in size, but also in price. Compatible with Power Delivery 3.0, it delivers power up to 30 W, which can charge an Apple tablet or a 12-inch Macbook.


Price: around 20 euros.

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