kung laptop gamit mo at sa wireless ka nadidisconnect, try mo muna gumamit ng lan cable. investigate mo muna kung magdrodrop yung connection mo. kung hindi ka mawalan ng internet, say for an hour, then may problema either yung wireless adapter ng laptop mo or yung router.
check mo kung yung gamit mong pangmanage ng wireless connection ay vendor supplied software tulad ng intel or dell wireless software at hindi yung default ng microsoft (control panel, network connections, wireless) in my experience mas stable yung software ng microsoft kesa sa vendor supplied software. kaya madalas dito sa office pag may bagong laptop dinidisable ko yung vendor supplied software sa windows services (control panel, administrative tools, services) hanapin mo yung service na "intel wireless manager", (siyempre dipende kung ano yung wireless adapter mo) then disable mo ito. pagrestart ng laptop mo, punta ka ng control panel, network connections, wireless at try mo magconnect sa wireless network mo, kelangan mo i-enter yung password ng network mo kung merong naka set sa linksys.
another reason kung bakit nagdropdrop yung signal mo, baka may kabitbahay ka na may wireless network rin at nagbrobroadcast ang wireless so sa parehong channel. try mo i change yung channel
kung hindi pa rin ito ang dahilan, at WEP ang security yung wireless network mo, try mo ibahin yung settings or i-disable mo nalang yung security at mag mac filtering ka nalang
http://www.watchingthenet.com/secure-linksys-wireless-router-with-mac-filtering.html