Wireless connection keeps disconnecting.

Ok i have 2 computers, 1 that uses wired connection and the one i use is wireless. I am one room away from the wireless router so i use a wireless adapter to get internet. Lately i have been losing connection constantly and when i solve the problem by clicking troubleshoot problem it always says default gateway was lost and it fixes it. It happened like 10 times in like 10 minutes. I was wondering if theres any way to fix this. Is it my adapter or my rounter or something else?