You get the serial number after payment. After registering on the AVG website, you will receive a permanent license number without reference to the country of activation.

Three simple steps to activate and install the product:
Register your serial number at: https://www.avg.com/en-us/activation and get a permanent license number;
Download the software product at the link http://files-download.avg.com/inst/mp/AVG_PCTuneUp_765.exe;
Install the program on your PC (during installation, you will need to enter the license number obtained after registering the product)

Download version for Windows x64: https://www.avg.com/download-thank-you.php?product=TUH-PAID-WIN64
Download version for Windows x32: https://www.avg.com/download-thank-you.php?product=TUH-PAID-WIN32

AVG PC TuneUp is a set of useful tools with which you can increase the speed of the processor,
clean it of unnecessary data, including extending the life of the computer.

Features AVG PC Tuneup:
Disabling unused functions and programs to free resources;
Search for programs that slow down the start and shutdown of the computer;
Correction of the reasons slowing down the startup process;
Identification and removal of underutilized programs;
Optimization of the function of reading and writing information on the hard drive;
Checking the hard drive for duplicate files, including if they have different names, and recommendations that can be safely removed from them;
Analysis of the internal and external hard drive determines the 100 most voluminous files and offers to delete them at the discretion of the user;
The ability to delete unnecessary hidden data from the Windows Store and Windows 8 and 8.1 applications, freeing up disk space;
Deletes old and damaged files from the browser, while freeing up disk space;
Disables unused Windows components that consume disk space;
The saving mode significantly increases the battery life by disabling unnecessary background processes and reducing energy consumption by external and internal devices;
Troubleshooting hard drive problems;
Registry editing and complete protection against accidental errors.