Sometimes, you might find issues in uploading files with size more than the size defined by default.
Here are the steps have to be done to set max_upload_filesize for a domain hosted in the windows server. For doing this,
You should have the permission to login via Remote connection to the server
>> Login into the RDP connection
>> Start > Run
>> Go to "HKLMSOFTWAREPHPPer Directory Values"
>> Create keys with the path "C://Inetpubvhostsdomain.com"
>> Here real domain name should be replaced with the key name
>> Add string value with the "upload_max_filesize" and set value as needed for ex., 20m
Now you will be able to upload the files with the size more than 20mb.