I have the same problem, and I use McAfee 8.7, Enterprise Edition. On Access Scan (OAS) is Enabled. When I disable it, there is no difference in the technic launcher, and I don't want to get anything but McAfee, due to previous hacks into my computer, SpyWare, Malware, general trojan viruses, et cetera. I am running Windows 7 Enterprise 64-Bit, with 16 gigs of RAM. If it makes a difference, my video card is an ATI Radeon 3800 HD, running one Asus 1680X1050 Monitor, and one other Dell 1920X1080 monitor. ALSO: I am running Java 7 64 bit, and I've tried all sorts of versions to no avail. Help is necessary to my survival (world in single player)!