The 620 is not supported on windows 10. It is no longer included in the insider program. Ia there any other way to upgrade nokia lumia 620 to windows 10?? As when we try to google then we can see number of people using windows 10 on Lumia 620!!
This is a complete step by step tutorials on How To Upgrade Any Windows Phone To Windows Phone 10 (Microsoft Lumia, Nokia Lumia.). Step tutorials on How To Upgrade Any Windows Phone To Windows.
Windows 10 technical preview on lumia 620 by using the hack. It is little laggy, but awsome.

Lumia 620 software can now be easily restored/reset/recovered using the available tools provided by the Microsoft, previously Nokia. Simply follow the given step by step guide to recover/reset/restore your Lumia 620 Phone software.

If your older Windows Phone is eligible to be upgraded to Windows 10 Mobile, here's how you might be able to download the over-the-air update that Microsoft just released.

I understand your query related to installing ezcap Cassette Capture drivers on your PC. As you have mentioned that you don’t have a disc drive on the PC, the drivers can be downloaded from the ezcap website as well, you can select the model number of the device and download the drivers accordingly. https://evertogo.amebaownd.com/posts/19008041.

Lumia 620 software can now be easily recovered/reset/restored for free using Microsoft tools | Lumia 620 software recovery | Resetting Phone Software for my Lumia 620

Great stuff comes in big packages!

Software Recovery Tool can prove to be a very helpful asset to reset and thus recover your Lumia 620 phone software directly from home, if your Lumia 620 phone is experiencing software related or software update problems.

With Windows Phone 8 and Windows Phone 8.1 models, if your Lumia 620 phone us not responding or it appears to be stuck at some process or even it is not starting, your Lumia 620 still can be recovered using Windows’s recovery tools.

Important Disclaimer:

Software Recovery Tool will erase completely all the content stored on your Lumia 620 phone, including apps and games (along with app data and game progress), text messages, call history, music, photos and more.

If possible, create the backup of your Lumia 620 phone first (Settings > backup). At the later time after resetting/restoring/recovering your Lumia 620 phone, you would be able to restore the backup.

The recovery process is prone to utilize some time depending on the speed of your internet connection speed. Also, you would not be able to use your Lumia 620 phone during the installation process.

Prerequisites for your Computer (PC):

Microsoft Windows 7 or newer.
USB cable to connect your phone to the computer.
Minimum 4 GB free storage space.

Which tool should I use?

Use the Windows Phone Recovery Tool for all Lumia phones running Windows Phone 8 or newer.

For all other Nokia branded phones use the Lumia Software Recovery Tool.

To see which Windows Phone operating system (OS) version is currently installed on your Lumia 620 phone, go to Settings > about.

Windows Phone Recovery Tool (for Lumia phones running Windows Phone 8 or newer)

Download and install Windows Phone Recovery Tool to your computer. If possible, make sure that your phone’s battery is fully charged.
When the installation has finished, start the application and the main screen will appear:

If your Lumia 620 phone is not automatically detected, disconnect all phones from your computer and press My phone was not detected at the bottom of the main screen.
If prompted, select the phone manufacturer.
Connect your Lumia 620 phone to your computer with a compatible USB cable.
Wait for your computer to detect the connected Lumia 620 phone and follow the screen instructions. If the phone is not connected within one minute you can try to restart your Lumia 620 phone: Keep USB connected, press and hold the Power and Volume down keys simultaneously. Release the pressed keys when your Lumia 620 phone vibrates.
Press Install software to start installing the software to your phone.

Lumia Software Recovery Tool (for older Lumia and other Nokia phones)

Download and install Lumia Software Recovery Tool to your computer. If possible, make sure that your Lumia 620 phone’s battery is fully charged.
Start Lumia Software Recovery Tool, and connect your Lumia 620 phone to your computer with a compatible USB cable. If prompted, select the correct USB mode on your Lumia 620 phone: Nokia Suite or Modem.
Follow the instructions shown on the tool.

Good news for those of you Windows Phone enthusiasts who own the Nokia Lumia 620, as Microsoft seems to have just kicked off the rollout of the long-awaited Lumia Cyan update.

Keep in mind that while some carrier-branded Lumia 620 already received the update here and there, the country variant or the unlocked version hasn't been eligible for the upgrade until recently.

https://evertogo.amebaownd.com/posts/19008069. Anyway, beginning this weekend, Nokia Lumia 620 owner should expect the Cyan update to hit their devices. Obviously, there are still regions where the update has yet to arrive, such as North America and the Middle East, but it shouldn't take long for Microsoft to make it available in these parts of the world as well.

For the time being, the Lumia Cyan update for Nokia Lumia 620 has been confirmed in Africa, Asia Pacific, Europe and Latin America.

Microsoft recently updated the Lumia Cyan upgrade tracker and Nokia Lumia 620 should now get the update in the following countries: Egypt, Libya, Nigeria, India, Sri Lanka, Taiwan, Thailand, Argentina, Brazil, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Paraguay, and Uruguay.

Lumia 620 Windows 10 Update Software

The Cyan update for Nokia Lumia 620 has also been confirmed in the following countries: Austria (A1 and Orange), Germany (T-Mobile and Vodafone), Greece (Vodafone), Hungary (Telenor and T-Mobile), Ireland (Vodafone), Italy (TIM, Vodafone and country variant), Portugal (Vodafone), Russia, Spain (Vodafone), Ukraine and UK (O2 and Vodafone).

As mentioned earlier, Lumia Cyan update for Nokia Lumia 620 is still under testing in countries in North America and the Middle East, but judging by the fact that the upgrade is now available in so many other regions, it's likely to arrive in these parts soon.

Windows Phone users who own the Nokia Lumia 620 and live in one of the countries listed above should manually check for the Lumia Cyan by going to Settings / Phone Update.

It's also worth mentioning that you will be needing around 1.5GB of free phone memory to install the Lumia Cyan on your smartphone. Also, make sure that your Lumia 620's battery is at least 50% charged.

Although the update should take around 15-30 minutes, depending on how much data you have stored on the phone, it may take up to 2 hours, especially if it's a major update.

Lumia 650 Windows 10 Updates

We'll be keeping a close eye to the other two regions (North America and Middle East) where the Cyan update for Nokia Lumia 620 has yet to arrive, so stay tuned for more info on the matter.