Hy guys!
Same problem, i get code 52! i have Windows 7 64bits, i tryed reinstalling the program, i'vd deleted the hamachi.sys file, restarted the service, in services.msc...no luck! my best try i'm going to wipe my windows and do a clean reinstall!
P.S. the update mentioned in earlier posts is only for 32bit windows 7!
P.S.S. If anybody else has another suggestion, please write it here ! thanks!