If you use an OS like Vista or Windows 7, try to run as an administrator, check you've patched kRO, Renewal and AbstractRO. I use a laptop too, and I don't get that error even if I live it on for lots of time. If it still doesn't work, try to download kRO, Renewal and Lite Patcher, and try install that (not sure it'll work, I've downloaded the Full Client and for me works fine!), or try to re-install Full Client as an administrator. Hope it'll help, at least wait for GMs!