Acer 7715Z - Wireless Connection Fails On First Few Attempts?

When I start my laptop, an Acer 7715Z, it will try to connect to the internet, but often fails.I then try it a few times manually. But the first 5 minutes I can try as often as I like but it will give a 'problem' popup, offering me a windows troubleshooter (which doesn't find the problem).I just have to try manually over and over again until it finally connects.Then my problems are over and I can internet without loosing connection. This doesn't only happen at home, but also when I'm at relatives. So my modem or ISP is not the problem. Also, my other equipment works just fine (mac, iphone, ipod, netbook).I've updated the Broadcom 802.11n adapter driver, run a virus/malware check, etc. but nothing works.The wireless lan adapter I assume basically works ok as it doesn't loose connection once I get online? Is there another setting I could check or optimise? I find it so strange. It's like the first 20-30 times trying to manually connect something is blocking it and once I get through I'm online without problems or losing connection. As I mentioned earlier, my other equipment go online almost immediately. Is there some windows setting that could block my manual attempts for a few times before letting me in? Could the broadcom adapter be faulty after all, even when after connecting it stays connected and problem free? Any control panel or other setting I could check first before sending it to be checked/repaired?