Hi MariaPetelo,
Follow the suggestions listed below for a possible fix:
Method 1: Follow the steps provided in the following link and check if that helps.
‘Wired and wireless network connection problems in Windows’
**Method 2:**Uninstall and reinstall the network adapter drivers and check if the issue persists.
a. Open Device Manager by clicking the Start button, clicking Control Panel, clicking System and Maintenance, and then clicking Device Manager. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
b. Double-click Network Adapters, right-click your adapter, and then click Properties.
c. Click the Driver tab, and then click uninstall.
Once you uninstall the drivers then download and install the network adapter drivers from the manufacturer’s website, refer the following link to update the drivers.
‘Update a driver for hardware that isn't working properly’
http://windows.microsoft.com/en-US/windows7/Update-a-driver-for-hardware-that-isnt-working-properly
You may also refer to the following link for more information.
‘Update drivers: recommended links’
http://windows.microsoft.com/en-US/windows7/Update-drivers-recommended-links
Let us know if this helps.