I have found that

by lacsr - 1/25/13 4:44 AM

In Reply to: Loss of wireless connection, Laptop by splittingeve

When the antivirus software has expired, it will give similar symptoms without any real warning. Check that first. Next, malware/spyware can mess with internet protocols, so do a thorough check with the antivirus software. If all that comes back good, then come back for the next installment.