Cider It sounds like you're doing great on the exercise!! Good idea to strengthen your knees before starting C25K - running is not great for your joints! If you can afford it, when the time comes, definitely invest in some good trainers! Most proper sports shops with do gait analysis so you can find the most supportive shoe for you. I know I need new trainers when I start getting regular shin splints 
Koko I lost 5lb in my first month and believe a lot of it is water weight! I also put on a pound in my first week which was so demotivating! But then read that is very normal when you restart an exercise regime because when muscles are repairing the body sends lots of water to them, so again, water weight! Its all about the water weight. I'm well into month two now and it's definitely slowed! I'm just exercising moderately and tracking everything on MFP, and it seems to be doing the job so far. It's a long journey, not a short one (especially if you don't have tonnes to lose).
So I am down another lb! Hurrah! So my first lb lost in June. Were about to move into month two of Insanity where the workouts increase from around 40 to 60 minutes, and get much more insane (!) so I hope I'll see a couple more lbs by the end of the month 
Starting weight June: 154lbs
Loss so far June: 1lb!
Current weight: 153lbs
Target weight: 145lbs
I do have three meals out over the next week, so it's going to be testing times...!
Happy Friday all! Enjoy your weekends! Remember, everything in moderation, including moderation 