Step 1 Download the correct driver for your adapter from our website: Http://www.tp-link.com, then extract the downloaded file, or insert the driver CD into the CD ROM of your computer.
Click Device Manager on the left side.
Step 3 Find and select the adapter, it might be in the Network Adapter or Other devices section and shown as 108M USB Adapter. Right click it, and select Update Driver Software…
Step 4 Select and click Browse my computer for driver software;
Step 5 Find and locate the folder which is for the TL-WN620G and contains the driver for your operating system, select the folder and then click OK.
If you are using Vista 32bit, please select the folder X86, if you are using
Step 6 Click Install this driver software anyway.
Wait for a few minutes, and the driver will be automatically installed.