start run type "regedit" br follow this path br "HKEY-LOCAL-MACHINEsystemcurrent ontrol set servicesdnscacheparameters" br creat a new "DWORDVALUE" IN RIGHT HAND COLOUM br br CacheHashTableBucketSize = 1 br CacheHashTableSize = 180 br MaxCacheEntryTtlLimit = ff00 br MaxSOACacheEntryTtlLimit = 12d br NegativeCacheTime= 0 br NetFailureCacheTime= br NegativeSOACacheTime= 0