Delete record where duplicate in part of raw 2 advanced

I am new @ sql , table name CHECKINOUT DB Name NEWFP i need to delete all record where the checktime between it from 1 to 5 minute or the same and must be the same user id but keep the fires record

USERID      CHECKTIME          CHECKTYPE   VERIFYCODE   [SENSORID]    WorkCode   SN102014-06-3019:17:37.000    I           010000102014-06-3019:18:42.000    I           010000102014-06-3019:19:46.000    I           010000102014-06-3020:17:58.000    I           010000102014-06-3020:20:46.000    I           010000

to be

USERID      CHECKTIME          CHECKTYPE   VERIFYCODE   [SENSORID]    WorkCode   SN102014-06-3019:17:37.000    I           010000102014-06-3020:17:58.000    I           010000