What should I do if the network speed becomes slow after Win7 creates a virtual network card?

Virtual network card function:
The virtual network card is mainly used to establish a local area network between remote computers. The virtual NIC link technology is VPN. For example, you can connect to a few machines in other places to establish a VPN client by establishing a virtual HUB. This way, even if you set up a LAN between these remote computers, you can also implement the LAN function with your machine. The most common is the LAN interconnection game. The more commonly used software in this area are openVPN, packetix VPN, hamachi, among which hamachi is the simplest VPN software.
Virtual network card function:
It can simulate the function of the hub and realize the function of VPN, so that the system recognizes this software as a network card. With this thing, as long as you can access the external network, you can connect to the virtual hub (HUB). It is combined with other computers to form a LAN. On this virtual LAN, all physical LAN operations can be performed, and they can access each other and play games online. The software can break through the firewall interception, the information is encrypted, and there is no problem in security. It can be simulated as a VPN NIC, which can be directly connected to the internal VPN server from outside the company to access various services within the company. Whether you are looking for a network management, or even catching data with Lotus Note, you can get what you want.
Solution:
The first step, after entering the Wind7 system, you click to open the Start menu, and then from the Start menu to the Control Panel interface.
Step 2: In the open control panel interface, click into the "Network and Internet" option, then click to enter the Network and Sharing Center, click on the "Change Adapter Settings in the left menu. ".
The third step, in the open interface, you can find the local connection options, you right click on the item, select properties, and then switch to the advanced column in the properties window, in the advanced tab, everyone Found "Large Send Offload", whether it is IPv4 or IPv6, all changed its value to "Disabled", and finally we clicked "OK".
After understanding the function and function of the virtual network card, the user can use the corresponding principle, and the problem of slow network speed can be improved after the corresponding option is disabled.