Welcome to Seven Forums,
Is this a laptop or desktop? If this is a laptop, are you using a wireless manager to connect?
Is your wireless adapter's driver up to date?
Do a simple test - Restart your computer, tap F8 and select Safe Mode with Networking. In here see if you are still disconnecting or not.
Please post an ipconfig /all for review.
Click on Start button then type cmd , see on the top right click on it and choose Run as Administrator. From the black screen, type the word ipconfig /all and press enter. Right click on the black screen or Command prompt then choose Select All and Paste the results on your next post.