Walk Through is running through the code line by 
line.simply executing the code.

Reviews include different kinds like peer 
reviews,formalreviews, technical reviews  and 
inspections.This review is done to confirm the correctness.

walk through is a informal review.In walk through author of 
code actually lead the walkthrough and other participants 
just review the code.


Code review can be formal or informal.If its informal then 
is is known as peer review or walk through where as if its 
formal then it is known as inspection.

reviews are static testing processes hence no code is 
actually executed in review.

Code review and code walkthrough is a phase in the software
development process.

But in code review we schedule a meeting in which the
authors of code, developer of the code, and perhaps quality
assurance (QA) testers get together to review code. Meeting
time is given earlier along with code to be reviewed at that
time by moderator.

But in code walkthrough we will not schedule any meeting it
can happen at any time or can happen suddenly without any
intimation before hand. They will come to meeting room
straight away and discuss the topic.


For code review and code walkthing finding and correcting
errors at this stage is relatively inexpensive and tends to
reduce the more expensive process of handling, locating, and
fixing bugs during later stages of development or after
programs are delivered to users.

1.Reviewers read the code line by line and walkthrough might
not read line by line just a informal go through to check for:


For either code review or walkthrough these are the
following things we need to check

    1. Flaws or potential flaws
    2. Consistency with the overall program design
    3. The quality of comments
    4. Adherence to coding standards. 
    5. Existance, for the functionality implemented.
    6. Clarity and Readability
    7. Completness - e.g., User, Training, Reference, Table
Of Contents.


Code review may be especially productive for identifying
security vulnerabilities. 

HOpe this might give you all answer.